Question 1

Which of the following ions is isoelectronic with the noble gas neon ($$\mathrm{Ne}$$)?

Accepted Answer

$$\mathrm{Na^+}$$

Question 2

A chloride ion ($$\mathrm{Cl^-}) $$has how many electrons?

Accepted Answer

$$18$$

Question 3

When barium reacts with iodine to form $$\mathrm{$$BaI_2$$}$$, what happens to the iodine atoms?

Accepted Answer

They gain electrons.

Question 4

Which of the following pairs is isoelectronic?

Accepted Answer

$$\mathrm{Ar}$$ and $$\mathrm{S$$^{2-}$$}$$

Question 5

Which noble gas does NOT have an octet of electrons in its outer shell?

Accepted Answer

$$\mathrm{He}$$

Question 6

When magnesium combines with bromine, the bond formed is best classified as:

Accepted Answer

Ionic

Question 7

Which of the following is the correct formula for calcium bromide?

Accepted Answer

$$\mathrm{$$CaBr_2$$}$$

Question 8

Which of the following compounds is named correctly?

Accepted Answer

$$\mathrm{$$AlCl_3$$}$$: aluminum chloride

Question 9

What is the formula for aluminum oxide?

Accepted Answer

$$\mathrm{Al_2O_3}$$

Question 10

Which of the following best describes a covalent bond?

Accepted Answer

A pair of electrons is shared.

Question 11

Which type of elements generally form covalent bonds?

Accepted Answer

Nonmetals

Question 12

Which of the following has the lowest electronegativity?

Accepted Answer

Sodium

Question 13

In a polar covalent bond, electrons are:

Accepted Answer

Shared unequally

Question 14

An atom with four valence electrons will form how many bonds with other atoms?

Accepted Answer

$$4$$

Question 15

Chalk is primarily composed of calcium carbonate. What is the formula for calcium carbonate?

Accepted Answer

$$\mathrm{$$CaCO_3$$}$$

Question 16

The formula for iron(II) phosphate is:

Accepted Answer

$$\mathrm{Fe_3$(PO_4$)_2}$$

Question 17

Which of the following ions is the nitrite ion?

Accepted Answer

$$\mathrm{NO_2$^-}$$

Question 18

If a central atom has a total of two electron sets and no lone pairs attached to it, what is the geometry about the central atom?

Accepted Answer

Linear

Question 19

The shape of a water molecule is:

Accepted Answer

Bent

Question 20

A central atom that has tetrahedral geometry will have a total of:

Accepted Answer

$$4$$ electron sets and $$0$$ lone pairs

Intro to Chemistry: Atomic Structure, Bonding, and Nomenclature Practice

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