1 - Chem Ionic Bonding/Compounds/Formulas

How many valence electrons are in bromine?

7

How many valence electrons are in oxygen?

6

How many valence electrons are in fluorine?

7

What is the charge of a particle having 9 protons and 10 electrons?

1-

What is the formula for calcium silicate?

CaSiO3

Write the correct name for Na₂C₄H₄O₆

sodium tartrate

Write the correct name for PtCl₂

platinum(II) chloride

How many valence electrons are in an atom of sulfur?

6

How many valence electrons does a lithium atom have?

1

How do metals generally obey the octet rule when reacting to form compounds?

they lose electrons

What is the maximum charge a monatomic ion is likely to have?

3

What is the charge on the cesium ion?

1+

The octet rule states that in chemical compounds atoms tend to obtain ____.

the electron configuration of a noble gas

How many electrons does strontium have to give up to achieve a noble-gas electron configuration?

2

Which of the following elements forms an ion with a 1– charge?

-fluorine

-hydrogen

-potassium

-sodium

fluorine

How many electrons does nitrogen gain in order to achieve a noble-gas electron configuration?

3

How does oxygen obey the octet rule when reacting to form compounds?

it gains electrons

What is the charge on the anion in the compound sodium sulfide?

2-

Which of the following occurs in an ionic bond?

-Oppositely charged ions attract.

-Two atoms share two electrons.

-Two atoms share more than two electrons.

oppositely charged ions attract

What is the net charge of the ionic compound calcium fluoride?

0

Which of the following is true about an ionic compound?

-The chemical formula shows the atoms in a molecule.

-The formula unit gives the number of each type of ions in a crystal.

-It is composed of anions and cations and yet it is electrically neutral.

It is composed of anions and cations and yet it is electrically neutral.

What is the formula unit of sodium nitride?

Na₃N

Ionic compounds are normally in which physical state at room temperature?

solid

Which of the following is true about the melting temperature of potassium chloride?

-The melting temperature is relatively high.

-The melting temperature is variable and unpredictable.

-The melting temperature is relatively low.

-Potassium chloride does not melt.

The melting temperature is relatively high.

What does the term coordination number in ionic crystals refer to?

the number of oppositely charged ions surrounding a particular ion

Under what conditions can sodium fluoride conduct electricity?

only when melted or dissolved in water

Which of the following particles are free to drift in metals?

-protons

-electrons

-neutrons

-cations

electrons

What characteristic of metals makes them good electrical conductors?

They have mobile valence electrons

An ionic bond is a bond between ____.

a cation and an anion

In which of the following are the symbols and names for both ions given correctly?

-Fe²⁺: ferrous ion; Fe³⁺: ferric ion

-Sn²⁺: stannic ion; Sn⁴⁺: stannous ion

-Co²⁺: cobalt(II) ion; Co³⁺: cobalt(V) ion

-Pb²⁺: lead ion; Pb⁴⁺: lead(IV) ion

Fe²⁺: ferrous ion; Fe³⁺: ferric ion

Which of the following correctly provides the name of the element, the symbol for the ion, and the name of the ion?

-fluorine, F⁺, fluoride ion

-zinc, Zn²⁺, zincate ion

-copper, Cu⁺, copper ion

-sulfur, S^2-, sulfide ion

sulfur, S^2-, sulfide ion

The ions formed by nonmetals in Groups 6A and 7A

have a numerical charge that is found by subtracting 8 from the group number.

An -ate or -ite at the end of a compound name generally indicates that the compound contains

a polyatomic anion.

Which of the following compounds contains the Mn³⁺ ion?

-MnS

-MnBr₂

_-MnO

-Mn₂O₃

Mn₂O₃

How are chemical formulas of binary ionic compounds generally written?

cation on left, anion on right

Which of the following is true about the composition of ionic compounds?

-They are composed of anions and cations.

-They are composed of anions only.

-They are composed of cations only.

-They are formed from two or more nonmetallic elements.

They are composed of anions and cations.

Which element, when combined with fluorine, would most likely form an ionic compound?

lithium

Which of the following shows correctly an ion pair and the ionic compound the two ions form?

-Sn⁴⁺, N^3–; Sn₄N₃

_-Cu²⁺, O²⁺; Cu₂O₂

_-Cr³⁺, I^–; CrI

-Fe³⁺, O^2–; Fe₂O₃

Fe³⁺, O^2–; Fe₂O₃

In which of the following are the name and formula both given correctly?

-sodium oxide, NaO

-barium nitride, BaN

-cobalt chloride, CoCl₃

_-tin(IV) fluoride, SnF₄

tin(IV) fluoride, SnF₄

Which of the following compounds contains the lead(II) ion?

-PbO

-PbCl₄

_-Pb₂O

-Pb₂S

PbO

Which set of chemical name and chemical formula for the same compound is correct?

-ammonium sulfite, (NH₄)₂S

-iron(III) phosphate, FePO₄

_-lithium carbonate, LiCO₃

_-magnesium dichromate, MgCrO₄

iron(III) phosphate, FePO₄