Chemistry 110 - (Chapter 2 Test Bank)
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45 Terms
Which of these elements is most likely to be a good conductor of electricity?
Fe
An atom of the isotope sulfur-31 consists of how many protons, neutrons, and electrons?
(p = proton, n = neutron, e = electron)
16 p, 15 n, 16 e
A magnesium ion, Mg2+, has
12 protons and 10 electrons
Which of these pairs of elements would be most likelt to form an ionic compound?
O and Zn
The elements in a column of the periodic table are known as
A group
Which is the correct formula for copper (II) phosphate?
Cu3(PO4)2
The correct name for NH4NO3 is
Ammonium nitrate
What is the formula for the ionic compound formed by calcium ions and nitrate ions?
Ca(NO3)2
The Stock System name for Mn2O7 is
Maganese(VII) oxide
Which of these elements is chemically similar to oxygen?
Sulfur
The formula of stannic oxide is SnO2. The valence of Sn is:
+4
Elements in Group 8A are known as the _________
Noble gases
_________ typically forms ions with a +2 charge
Alkaline earth metals
An anion is defined as
A charged atom or group of atoms with a net negative charge
A cation is defined as
An atom or group of atoms with a net positive charge
Atoms of the same element with different mass numbers (or number of neutrons) are called
Isotopes
How many neutrons are there in an atom of lead 82Pb whose mass number is 208?
126
A magnesium ion, 20Ca2+, has
20 protons and 18 electrons
A sulfide ion, 16S2-, has
16 protons and 18 electrons
Which of these pairs of elements would be most likely to form a molecular compound?
C and O
What is the formula for the ionic compound formed by calcium ions and nitrate ions?
Ca(NO3)2
Which is the correct formula for copper(II) phosphate?
Cu3(PO4)2
The correct name for NH4NO3 is
Ammonium nitrate
The correct name for PCI5 is
Phosphorus pentachloride
Which of the following expressions represents two molecules of water?
2 H2O
The empirical formula of a compound with molecules containing 12 carbon atoms, 14 hydrogen atoms, and 6 oxygen atoms is
C6H7O3
The charge of the manganese in the salt MnF3 is
+3
Magnesium reacts with a certain element to form a compound with the general formula MgX. What would be the most likely formula for the compound formed between potassium and element X?
None of the above
Barium forms an ion with a charge of
None of the above
Aluminum forms an ion with a charge
of +3
Iodine forms an ion with a charge of
-1
The chemical symbol for the ion with 11 protons and 10 electrons.
Na+
Which of these compounds is a binary compound?
NaCl
Atoms with the same number of electrons and number of protons are called
Neutral atoms
Atoms which have different number of electrons are called
Ions
Using the following table, which of the species are postiviely charged?
IV and V
Which isotope has 45 neutrons?
8035Br
In the periodic table, the elements are arranged in
Order of increasing atomic number
An element in the upper right corner of the periodic table is
A non-metal
An element that appears in the lower left corner of a periodic table is
A meal
A molecular formula always indicates
How many of each atom are in a molecule
An empirical formula always indicates
The simplest whole-number ratio of different atoms in a compound
There are _____ protons, _____ neutrons, and _____ electrons in 131I-
53, 78, and 54
Which species has 48 electrons?
11850Sn+2