Question 1

Which of the following best describes the difference between an empirical formula and a molecular formula?

Accepted Answer

An empirical formula shows the smallest whole-number ratio of elements in a compound, while a molecular formula shows the actual number of atoms of each element in a molecule.

Question 2

Which of the following is the correct empirical formula for benzene, given its molecular formula is $$C_6H_6$$?

Accepted Answer

$$CH$$

Question 3

What type of chemical bond is formed when two or more atoms share electrons?

Accepted Answer

Covalent bond

Question 4

Which model best shows the relative size of atoms and their orientation in a molecule?

Accepted Answer

Space filling model

Question 5

Given the compound $$MgO$$, which ions are present and what is its correct name?

Accepted Answer

Mg$$^{2+}$$ and O$$^{2-}$$; Magnesium Oxide

Question 6

Which of the following compounds is named using the Roman numeral system?

Accepted Answer

FeCl$$_3$$

Question 7

What is the correct name for $$CuCl_2$$?

Accepted Answer

Copper (II) chloride

Question 8

Which rule is followed when naming a binary ionic compound composed of a metal and a non-metal?

Accepted Answer

The cation is named first, followed by the anion.

Question 9

Which of the following ions is a polyatomic ion that must be memorized according to the study materials?

Accepted Answer

NO$$_3$$^{-}$$

Question 10

A compound contains the ions $$NH_4$$^+$$ and SO_4$^{2-}. $$What is its correct chemical formula?

Accepted Answer

$$(NH_4$)_2SO_4$$

Question 11

Which of the following best explains why ionic bonds are generally stronger than covalent bonds?

Accepted Answer

Ionic bonds are due to the electrostatic attraction between oppositely charged ions.

Question 12

What is the correct name for the compound $$FeCl_2$$?

Accepted Answer

Ferrous chloride

Question 13

Which of the following is the correct formula for potassium nitrate?

Accepted Answer

$$KNO_3$$

Question 14

If a compound contains $$Ca^{2+}$$ and $$S^{2-}$$ ions, what is its empirical formula?

Accepted Answer

$$CaS$$

Question 15

Which of the following is an example of an oxyanion?

Accepted Answer

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

Question 16

A student is given a sample of $$Na_3N. $$What is the correct name for this compound?

Accepted Answer

Sodium nitride

Question 17

Which of the following statements about structural formulas is correct?

Accepted Answer

Structural formulas show the connectivity of atoms and the bonds between them.

Question 18

What is the correct name for $$NH_4Cl$$?

Accepted Answer

Ammonium chloride

Question 19

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

Accepted Answer

$$CsBr$$

Question 20

A compound contains $$Fe^{3+}$$ and $$Cl^{-}$$ ions. What is its correct name?

Accepted Answer

Ferric chloride

Chemical Bonding and Nomenclature: Covalent and Ionic Compounds

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