Basic Bonds - 6

How many valence electrons are in an atom of magnesium? a. 2 b. 3 c. 4 d. 5

2

How many valence electrons are transferred from the calcium atom to iodine in the formation of the compound calcium iodide? a. 0 b. 1 c. 2 d. 3

2

What is the charge on the strontium ion? a. 2- b. 1- c. 1+ d. 2+

2+

How many valence electrons are in an atom of phosphorus? a. 2 b. 3 c. 4 d. 5

5

What is the main difference in covalent bonds in diatomic chlorine and diatomic oxygen? Diatomic means two atoms of the same type.

Chlorine forms one covalent bond and oxygen forms two covalent bonds

A molecule with a single covalent bond is ____. a. CO2 b. Cl2 c. CO d. N2

Cl2

Iron ions with a +2 or +3 charge are called: a. Ferric and ferrous b. Ironic, ironous c. Feride, ferrate d. Ferranous, ferrite

Ferric and ferrous

How does calcium obey the octet rule when reacting to form compounds? a. It gains electrons. b. It gives up electrons. c. It does not change its number of electrons. d. Calcium does not obey the octet rule.

It gives up electrons.

Which of the following is true about an ionic compound? a. It is a salt. b. It is held together by ionic bonds. c. It is composed of anions and cations. d. all of the above

It is a salt. It is composed of anions and cations. It is held together by ionic bonds.

What is the formula of the ion formed when potassium achieves noble-gas electron configuration? a. K2+ b. K+ c. K1- d. K2-

K+

Lattice energy is affected by all of the following factors EXCEPT: a. Number of electrons shared in chemical bond c. Size of ions b. Charge of ions d. All of these affect lattice energy

Size of ions

What is the difference between the systematic and common name for monatomic ions?

The systematic name is the metal name followed by the charge on the metal atom. It is written as a Roman numeral and is in parentheses. The common name is formed from the Latin root followed by -ous for low charge form, -ic for high charge form

Once formed, how are coordinate covalent bonds different from other covalent bonds? a. They are stronger. b. They are more ionic in character. c. They are weaker. d. There is no difference.

There is no difference.

Which of the following is NOT a characteristic of most ionic compounds? a. They are solids. b. They have low melting points. c. When melted, they conduct an electric current. d. They are composed of metallic and nonmetallic elements.

They have low melting points.

How do atoms achieve noble-gas electron configurations in single covalent bonds? a. One atom completely loses two electrons to the other atom in the bond. b. Two atoms share two pairs of electrons. c. Two atoms share two electrons. d. Two atoms share one electron.

Two atoms share two electrons.

Which of these elements does not exist as a diatomic molecule? a. Ne b. F c. H d. I

a.

compound composed of two different elements

binary compound

Which lists contains only elements with more than one valence electron? a. Copper, gold, aluminum, lithium b. Iron, sodium, magnesium, boron c. Lead, chromium, mercury, gold d. Manganese, potassium, carbon, calcium

c.

When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. a. one-sided covalent bond b. unequal covalent bond c. coordinate covalent bond d. ionic covalent bond

coordinate covalent bond

a covalent bond in which the shared electron pair comes from only one of the atoms

coordinate covalent bond

a covalent bond in which two pairs of electrons are shared

double covalent bond

Which of the following is an ionic compound whose aqueous solution conducts electricity? a. salt b. electrolyte c. lattice solution d. covalent solution

electrolyte

Which of the following elements does NOT form an ion with a charge of 1? a. fluorine b. hydrogen c. potassium d. sodium

fluorine

Which elements can form diatomic molecules joined by a single covalent bond? a. hydrogen only b. halogens only c. halogens and members of the oxygen group only d. hydrogen and the halogens only

hydrogen and the halogens only

the force of attraction binding oppositely charged ions together

ionic bond

What is the name of the ionic compound formed from lithium and bromine? a. lithium bromine b. lithium bromide c. lithium bromium d. lithium bromate

lithium bromide

Which of the following pairs of elements is most likely to form an ionic compound? a. magnesium and fluorine b. nitrogen and sulfur c. oxygen and chlorine d. sodium and aluminum

magnesium and fluorine

Which noble gas has the same electron configuration as the oxygen in a water molecule? a. helium b. neon c. argon d. xenon

neon

Under what conditions can potassium bromide conduct electricity? a. only when melted b. only when dissolved c. only when it is in crystal form d. only when melted or dissolved in water

only when melted or dissolved in water

In chemical compounds, atoms like to have 8 electrons in their outer shell, this gives them __________. a. the electron configuration of a noble gas b. more protons than electrons c. eight electrons in their principal energy level d. more electrons than protons

the electron configuration of a noble gas