CHEM Test 1

Which of the following is an Alkali metal?

A. He

B. O

C. Cl

D. Al

E. Na

E. Na

An element with two valence electrons is

A. Ca

B. Se

C. Si

D. C

E. Rb

A. Ca

Which of the following is the correct electron-dot symbol for carbon?

When hydrochloric acid dissolves in water what ions are formed?

A. OH^- and Cl^-

B. H and Cl

C. H⁺ and Cl^-

D. Only Cl^-

E. Only H¹⁺

C. H⁺ and Cl^-

The formula Ca(NO₃)₂ tells us that one formula unit of this compound is composed of _____ calcium atoms, _____ nitrogen atoms, and ______ oxygen atoms.

A. One; two; five

B. One; one; six

C. One; two; six

D. One; one; five

E. Two; two; six

C. One; two; six

What is the density of a substance with a mass of 45.00 g and a volume of 26.4 mL?

A. 0.587 g/mL

B. 45.0 g/mL

C. 1.7 g/mL

D. 0.59 g/mL

E. 1.70 g/mL

E. 1.70 g/mL

The correct formula for the compound formed from Mg and S is ______

A. MgS₂

B. Mg₂S₃

C. MgS

D. Mg₂S

E. Mg₂S₂

C. MgS

Valence electrons in the main group elements are contained in which type(s) of orbitals?

A. s and p

B. d

C. p

D. s

E. f

A. s and p

An atom that contains 47 protons, 47 electrons, and 60 neutrons is an isotope of

A. Nd

B. Ag

C. Bh

D. Al

E. Cannot be determined from the information given

B. Ag

A nugget of gold with a mass of 521 g is added to 50.0 mL of water. The water level rises to a volume of 77.0 mL. What is the density of the gold?

A. 19.3 g/mL

B. 6.77 g/mL

C. 10.4 g/mL

D. 0.0518 g/mL

E. 1.00 g/mL

A. 19.3 g/mL

An atom with three valence electrons will most likely _____ to attain an octet of valence electrons.

A. Gain one electron

B. Lose three electrons

C. Lose one electron

D. Gain five electrons

E. Gain three electrons

B. Lose three electrons

Which of the following elements is most likely to form an ion with a +2 charge?

A. Br

B. Mg

C. S

D. K

E. Si

B. Mg

What is the correct formula for the oxide ion?

A. O⁺

B. O³⁺

C. O²⁺

D. O^2-

E. O

D. O^2-

Which of the following elements is a metalloid?

A. Gold

B. Silicon

C. Nitrogen

D. Iron

E. Lithium

B. Silicon

An element belonging to the halogen family would be expected to have a _____ ionization energy and a _______ electron affinity.

A. Small; large

B. Large; large

C. Small; small

D. Large; small

E. None of the above

B. Large; large

Iron pyrite (fool’s gold) is iron(II) sulfide. What is its formula?

A. Fe₂S₃

B. FeS

C. Fe₂(SO₃)₃

D. FeSO₃

E. FeSO₄

B. FeS

The energy associated with the motion of particles in a substance is called ___________?

A. Heat

B. Chemical energy

C. Potential energy

D. Electrical energy

E. Temperature

A. Heat

Which one of the following compounds contains an ion with a 3+ charge?

A. FeCl₃

B. Na₂O

C. KCl

D. CuCl

E. MgCl₂

A. FeCl₃

The number of significant figures in the measurement of 45.030 mm is?

A. None

B. Three

C. Four

D. Five

E. Six

D. Five

Which characteristics correctly describe a neutron?

A. Approximate mass 1 amu; charge -1; inside nucleus

B. Approximate mass 1 amu; charge 0; inside nucleus

C. Approximate mass 5 × 10^-4 amu; charge 0; inside nucleus

D. Approximate mass 1 amu; charge +1; inside nucleus

E. Approximate mass 5 × 10^-4; charge -1; outside nucleus

B. Approximate mass 1 amu; charge 0; inside nucleus

An anion always _____

A. Forms covalent bonds

B. Contains a metal and a nonmetal

C. Has a positive charge

D. Has a negative charge

E. Contains a group of two or more atoms with a positive charge

D. Has a negative charge

How many electrons can occupy the 3d subshell?

A. 2

B. 8

C. 1

D. 6

E. 10

E. 10

Which of the following is a physical change?

A. A tomato ripening

B. Baking a cake

C. Digesting a meal

D. Fermenting grapes to produce wine

E. Solid dry ice changing to a gas

E, Solid dry ice changing to gas

Which of the following numbers contain the designated correct number of significant figures?

A. 0.04300 5 significant figures

B. 3.0650 4 significant figures

C. 156 000 3 significant figures

D. 0.00302 2 significant figures

E. 1.04 2 significant figures

C. 156 000 3 significant figures

The element in this list with chemical properties similar to magnesium is ________?

A. Chlorine

B. Strontium

C. Carbon

D. Sodium

E. Boron

B. Strontium

What is the name of K₂S?

A. Potassium disulfide

B. Potassium(II) sulfide

C. Potassium sulfide

D. Dipotassium sulfide

E. None of the above

C. Potassium sulfide

In terms of atomic structure, the common characteristics of elements in the same group is?

A. Number of neutrons

B. Number of electrons

C. Number of electrons in the outermost shell

D. Number of protons

E. None of the above

C. Number of electrons in the outermost shell

The value of Z for an atom containing 29 protons, 29 electrons, and 34 neutrons is _______?

A. 63

B. 58

C. 29

D. 34

E. 5

C. 29

Identify the noble gas in the following list.

A. Oxygen

B. Helium

C. Gold

D. Chlorine

E. Nitrogen

B. Helium

A positively charged particle formed by loss of one or more electrons from an atom is called a(an)

A. Nucleus

B. Proton

C. Cation

D. Anion

E. Isotope

C. Cation

What ions are formed when sodium hydroxide dissolves in water?

A. H⁺ and OH^-

B. Only OH^-

C. Only Na⁺

D. H⁺ and Na⁺

E. Na⁺ and OH^-

E. Na⁺ and OH^-

The amount of space occupied by a substance is its ________?

A. Weight

B. Length

C. Volume

D. Density

E. Mass

C. Volume

Ionization energy is ________?

A. Highest for metals in Group 1A (1)

B. The energy an ion acquires from an electron

C. Higher for potassium than for lithium

D. The energy needed to remove the least tightly bound electron

E. None of the above

D. The energy needed to remove the least tightly bound electron

An imaginary element Xq consists of two isotopes having masses of 100.0 amu and 102.0 amu. A sample of Xq was found to contain 20.0% of the ¹⁰⁰Xq isotope and 80.0% of the ¹⁰²Xq. Calculate the atomic weight of Xq.

A. 101.0 amu

B. 101.6 amu

C. 100.2 amu

D. 100.4 amu

E. 202.0 amu

B. 101.6 amu

The shape of the water molecules (H₂O) is _______

A. Tetrahedral

B. Bent

C. Trigonal planar

D. Trigonal pyramidal

E. Linear

B. Bent

Which element is most likely to have chemical properties similar to those of potassium (atomic number 19)?

A. Rb (atomic number 37)

B. Sc (atomic number 21)

C. CA (atomic number 20)

D. Sr (atomic number 38)

E. Are (atomic number 18)

A. Rb (atomic number 37)

In which of the following is the metric unit paired with its correct abbreviation?

A. Gram/ gm

B. Milliliter/ mL

C. Microgram/ mg

D. Kilogram/ cg

E. Centimeter/ km

B. Milliliter/ mL

Which of the following is the largest unit?

A. Decimeter

B. Meter

C, Millimeter

D. Kilometer

E. Micrometer

D. Kilometer

What is the correct formula for the ionic compound containing iron(III) ions and oxide ions?

A. FeO

B. Fe₂O₃

C. FeO₂

D. Fe₃O₂

E. Fe₂O₂

B. Fe₂O₃

The name of the compound with formula NaMnO₄ is

A. Sodium permanganate

B. Sodium magnesium tetraoxide

C. Sodium manganate

D. Sodium magnesium oxide

E. Sodium manganese tetraoxide

A. Sodiium permanganate

Which one of the compounds below is most likely to be ionic?

A. NO₂

B. CBr₄

C. SrBr₂

D. H₂O

E. All of these are ionic

C. SrBr₂

When an atom donates an electron, that electron

A. Neutralizes a proton to form a neutron

B. Pairs with another electron to form a covalent bond

C. Is lost for all time

D. Is acquired by another atom which becomes a cation

E. Is acquired by another atom which becomes an anion

E. Is acquired by another atom which becomes an anion

Absolute zero is _____.

A. The coldest temperature possible

B. The temperature on the Kelvin scale corresponding to 32 F

C. The freezing point of water using the Celsius scale

D. The boiling point of liquid nitrogen

E. The freezing point of liquid nitrogen

A. The coldest temperature possible

In ionic compounds, ________ lose their valence electrons to form positively charged _______.

A. Nonmetals; anions

B. Metals; cations

C. Metals; anions

D. Metals; polyatomic ions

E. Nonmetals; cations

B. Metals; cations

The main type of attractive forces between molecules of hydrogen (H₂) are ________.

A. Diploe-diploe attractions

B. Dispersion forces

C. Polar covalent

D. Hydrogen bonds

E. Ionic bonds

B. Dispersion forces

Which of the following would not be a physical change?

A. Melting gold to make jewelry

B. Burning gasoline in a lawnmower

C. Freezing water to make ice cubes

D. Tearing a piece of aluminum foil

E. Boiling water for soup

B. Burning gasoline in a lawnmower

A dose of aspirin of 5.0 mg per kilogram of body weight has been prescribed to reduce the fever of an infant weighing 8.5 pounds. The number of milligrams of aspiring that should be administered is ______.

A. 1.6 mg

B. 53 mg

C. 5.0 mg

D. 19 mg

E. 0.59 mg

D. 19 mg

A small negatively charged particle formed when an atom gains one or more electrons is called a(an)

A. Isotope

B. Nucleus

C. Anion

D. Proton

E. Cation

C. Anion

Water, H₂O, is an example of a(n) ______.

A. Solid

B. Wave

C. Chemical

D. Element

E. Electric charge

C. Chemical

Elements in group 2A (2) of the periodic table form ions with a charge of _______

A. 3+

B. 1-

C. 1+

D. 2+

E. 0

D. 2+

What elements are in hydroxyapatite, Ca₅(PO₄)₃OH, a major compound in human bones and teeth?

A. Calcium, phosphorous, oxygen, helium

B. Carbon, potassium, oxygen, helium

C. Carbon, potassium, oxygen, hydrogen

D. Carbon, phosphorous, oxygen, helium

E. Calcium, phosphorus, oxygen, hydrogen

E. Calcium, phosphorous, oxygen, hydrogen

The HCO₃^1- ion is called

A. Carbide

B. Carbonate

C. Hydrogen carbide

D. Carbonite

E. Hydrogen carbonate

E. Hydrogen carbonate

What is the electron configuration if Mg?

A. 1s²2s²2p⁸

B. 1s²2s²2p⁶3s²3p⁶4s²3d⁵

C. 1s²2s²2p⁶3s²

D. 1s²2s²2p⁶3s¹3p³

E. None of the above

C. 1s²2s²2p⁶3s²

The shape of the ammonia molecule (NH₃) is ______.

A. Trigonal planar

B. Bent

C. Trigonal pyramidal

D. Tetrahedral

E. Linear

C. Trigonal pyramidal

A property of ionic compounds is that they are

A. Soft

B. Hard

C. Brittle

D. Both B and C

E. A, B, and C are correct

D. Both B and C

Potassium

A. Pt

B. K

C. Ko

D. Po

E. P

B. K

Sodium

A. Sm

B. No

C. So

D. Na

E. Au

D. Na

Aluminum

A. Am

B. Sn

C. Al

D. Au

E. Ag

C. Al

Which of the following subshells consists of three orbitals?

A. 4d

B. 4s

C. 4f

D. 4p

E. None of the above

D. 4p

Which of the following is a chemical?

A. Heat

B. Noise

C. A wave

D. Sugar

E. Light

D. Sugar

All of the following are properties typical of ionic compounds except

A. Exist as crystalline solids at room temperature

B. Conduct electrical current if dissolved in water

C. Have very high melting points and boiling points

D. Form distinct molecules by interaction of specific particles

E. Shatter when crystals are struck

D. Form distinct molecules by interaction of specific particles

Which characteristics correctly describe a proton?

A. Approximate mass 1 amu; charge 0; inside nucleus

B. Approximate mass 1 amu; charge +1; inside nucleus

C. Approximate mass 5 × 10^-4 amu; charge -1; outside nucleus

D. Approximate mass 5 × 10^-4 amu; charge +1; inside nucleus

E. Approximate mass 1 amu; charge +1; outside nucleus

B. Approximate mass 1 amu; charge +1; inside nucleus

The formula for ammonium hydroxide is

A. NH₄NO₃

B. Al(OH)₃

C. NH₄O

D. NH₄OH

E. OHNH₄

D. NH₄OH

The shell having n=2 contains ____ subshells, ______ orbitals, and up to ____ electrons.

A. 1; 2; 4

B. 4; 8; 16

C. 3; 6; 12

D. 2; 4; 8

E. None of the above

D. 2; 4; 8

How many electrons will chlorine gain or lose when it forms an ion?

A. Lose 7

B. Gain 1

C. Gain 2

D. Lose 1

E. Lose 3

B. Gain 1

The ionization energy of atoms _________

A. Decreases going down within a group

B. Does not change going down within a group

C. Increases going down within a group

D. Decreases going across a period

E. None of the above

A. Decreases going down within a group

Which of the following is not an element?

A. Silver

B. Gold

C. Carbon

D. Tin

E. Water

E. Water

How many electrons are there in the valence shell of a nitrogen atom?

A. 7

B. 2

C. 3

D. 0

E. 5

E. 5

Elements in the periodic table are arranged according to

A. Atomic number

B. Atomic weight

C. Number of neutrons

D. Alphabetical order

E. Date of discovery

A. Atomic number

The temperature of liquid nitrogen is -196 C. What is the corresponding reading on the Kelvin scale?

A. 146 K

B. -127 K

C. -91 K

D. 48 K

E. 77 K

E. 77 K

The number of neutrons in an atom is equal to

A. The mass number

B. Mass number - atomic number

C. The atomic number

D. Atomic number - mass number

B. Mass number - atomic number

One characteristic of a cation is that

A. It has equal numbers of protons and electrons

B. It has more electrons than protons

C. It has more protons than electrons

D. The number of neutrons is related to the number of electrons

E. The relationship between protons and electrons varies with the cation in question

C. It has more protons than electrons

The elements lithium, sodium, and potassium _______

A. Are isotopes of each other

B. Have the same number of neutrons

C. Are in the same period of elements

D. Have the same mass number

E. Are in the same group

E. Are in the same group

To form an ion, a sodium atom _______.

A. Loses two electrons

B. Loses seven electrons

C. Loses one electron

D. Gains one electron

E. Gains two electrons

C. Loses one electron

The element with the electron configuration 1s²2s²2p⁶3s²3p⁶4s¹ is

A. K

B. Mg

C. Ca

D. Ar

E. Rb

A. K

The element with the electron configuration 1s²2s²2p⁴ is

A. O

B. Si

C. S

D. Be

E. C

A. O

Which of the following properties is not a characteristic of the group 1A (1) elements (Alkali metals)?

A. They are good conductors of electricity

B. They are good conductors of heat

C. Most of them are liquids at room temperature

D. They are shiny

E. They react vigorously with water

C. Most of them are liquids at room temperature

What is the name of SnCl₂?

A. Ditin chloride

B. Tin dichloride

C. Tin(II) chloride

D. Strontium chloride

E. Tin chloride

C. Tin(II) chloride

A doctor’s order is 0.125 g of ampicillin. The liquid suspension on hand contains 250 mg/5.0 mL. How many milliliters of the suspension are required?

A. 2.5 mL

B. 0.0063 mL

C. 3.0 mL

D. 6.3 mL

E. 0.0025 mL

A. 2.5 mL

Which of the following is a heterogeneous mixture?

A. Carbon

B. Water

C. Noodle soup

D. Sugar

E. Tea

C. Noodle soup

Adding one neutron to the nucleus of an atom

A. Increases its atomic mass by two units, but does not change its atomic number

B. Converts it to an isotope of the same element

C. Increases its atomic number by one unit but does not change its atomic mass

D. Does not change either its atomic number or its atomic mass

E. Converts it to an atom of a different element

B. Converts it to an isotope of the same element

An s-block element in the 5th period is

A. Mo

B. Sr

C. Y

D. Ag

E. As

B. Sr

The main type of attractive forces between molecules of carbon tetrabromide (CBr₄) are ____.

A. Diploe-diploe attractions

B. Ionic bounds

C. Hydrogen bonds

D. Dispersion forces

E. Polar covalent

D. Dispersion forces

A formula unit of ammonium sulfate consists of ___ ammonium ions and _____ sulfate ions.

A. Two; three

B. Four; four

C. Three; two

D. Two; one

E. One; two

D. Two; one

Helium is a(n)

A. Homogeneous mixture

B. Compound

C. Electron

D. Element

E. Heterogeneous mixture

D. Element

What is the formula for the ionic compound formed between lithium and bromide?

A. LiBr

B. LiBr₂

C. LiB

D. Li⁺Br^-

E. Li₂Br

A. LiBr

What is the symbol for the ion with 19 protons and 18 electrons?

A. K⁺

B. F^-

C. Ar⁺

D. K^-

E. F⁺

A. K⁺

The formula for the compound chromium(II) nitrate is

A. CrNO₂

B. Cr₂NO₃

C. Cr(NO₃)₂

D. C₂NO₃

E. CrNO₃

C. Cr(NO₃)₂

An element with the same number of valence electrons as the element with the electron configuration 1s²2s²2p⁶3s²3p⁵ is

A. Argon

B. Sulfur

C. Oxygen

D. Potassium

E. Iodine

E. Iodine

The elements sodium, magnesium, and silicon _____.

A. Are in the same group

B. Are isotopes of each other

C. Have the same mass number

D. Are in the same period of elements

E. Have the same number of neutrons

D. Are in the same period of elements

If an element G could react with sulfur to form an ionic compound with formula GS₂, the charge on the ion formed by G would be

A. 1+

B. 4+

C. 2-

D. 2+

E. 4-

B. 4+

What is the formula of a compound formed by the ions M²⁺ and X^3-?

A. M₂X₃

B. M₃X₂

C. MX₃

D. M₂X

E. None of the above

B. M₃X₂

A group of covalently bonded atoms that has an overall electrical charge is called a(n) ______

A. Anion

B. Polyatomic ion

C. Cation

D. Ionic compound

E. Molecule

B. Polyatomic ion

The name of Al₂(SO₄)₃ is _____

A. Aluminum(III) sulfate

B. Dialuminum trisulfate

C. Dialuminum sulfate

D. Dialuminum trisulfide

E. Aluminum sulfate

E. Aluminum sulfate

In this list, which substance can be classified as a chemical?

A. Sleep

B. Cold

C. Salt

D. Temperature

E. Heat

C. Salt

The maximum number of electrons in any orbital is

A. 1

B. 2

C. 3

D. 4

E. 5

B. 2

What is the most likely charge on an ion formed by an element with a valence electrons configuration of ns²np⁵?

A. 1+

B. 5+

C. 2+

D. 5-

E. 1-

E. 1-

Which of the following formulas is incorrect for a cobalt(III) compound?

A. CoCl₃

B. CoCO₃

C. Co(NO₃)₃

D. Co₂O₃

E. CoPO₄

B. CoCO₃

A formula unit of the ionic compound copper(II) carbonate consists of ______ copper(II) ions and ______ carbonate ions.

A. Two; one

B. Two; two

C. One; one

D. Some other combination of ions

E. One; two

C. One; one

A patient has a temperature of 38.5 C. What is the temperature in degrees Fahrenheit?

A. 11.7 F

B. 101.3 F

C. 126.9 F

D. 70.5 F

E. 311 F

B. 101.3 F