Question 1

Which of the following ions is written with an incorrect charge based on its position in the periodic table?

Accepted Answer

K$$^{2+}$$

Question 2

What is the correct formula for the ionic compound formed between magnesium and fluorine?

Accepted Answer

MgF$$_2$$

Question 3

How many total atoms are present in one molecule of Li$$_2SO$_4$$?

Accepted Answer

8

Question 4

Which of the following best describes a molecule?

Accepted Answer

A group of two or more atoms combined chemically, which can be the same or different types of atoms.

Question 5

Which of the following is the correct Lewis symbol for nitrogen (N)?

Accepted Answer

$$\cdot\cdot\cdot N \cdot\cdot$$

Question 6

Which of the following statements about ionic bonds is correct?

Accepted Answer

Ionic bonds involve the transfer of electrons from a metal to a nonmetal.

Question 7

What is the correct formula for the compound formed between aluminum and oxygen?

Accepted Answer

Al$$_2O$_3$$

Question 8

Which of the following best explains why sodium (Na) forms a Na$$^+$$ ion?

Accepted Answer

Sodium loses one electron to achieve a stable octet.

Question 9

Which of the following is a correct representation of manganese (II)?

Accepted Answer

Mn$$^{2+}$$

Question 10

A patient is given a medication containing calcium nitrate. What is the correct chemical formula for calcium nitrate?

Accepted Answer

Ca(NO$$_3$$)$$_2$$

Question 11

Which of the following best describes the octet rule?

Accepted Answer

Atoms tend to gain, lose, or share electrons to achieve eight electrons in their outermost shell.

Question 12

Which of the following is the correct formula for the ionic compound formed between calcium and nitrogen?

Accepted Answer

Ca$$_3N$_2$$

Question 13

Which of the following is a polyatomic ion?

Accepted Answer

SO$$_4$$^{2-}$$

Question 14

Which of the following best describes a compound?

Accepted Answer

A substance containing different types of atoms in fixed proportions.

Question 15

Which of the following is the correct formula for the compound formed between lithium and oxygen?

Accepted Answer

Li$$_2O$$

Question 16

A sample of sodium chloride (NaCl) is dissolved in water. Which type of bond is broken when NaCl dissolves?

Accepted Answer

Ionic bond

Question 17

Which of the following best describes the difference between an atom and a molecule?

Accepted Answer

An atom is a single unit of an element, while a molecule is a group of two or more atoms chemically bonded together.

Question 18

Which of the following is the correct formula for the compound formed between sodium and sulfur?

Accepted Answer

Na$$_2S$$

Question 19

Which of the following is a correct statement about transition metals?

Accepted Answer

Transition metals can form ions with different positive charges.

Question 20

Which of the following is the correct formula for the compound formed between aluminum and sulfur?

Accepted Answer

Al$$_2S$_3$$

Ionic and Molecular Compounds: Structure, Bonding, and Formulas

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