Q3 Chemistry Common Assessment Review

A chemical bond results from the mutual attraction of the nuclei of atoms and

• electrons

• protons

• neutrons

• dipoles

Name the compound H₂S

• Hydrosulfurous acid

• Hydrosulfuric acid

• Hydrogen sulfide

• Dihydrogen sulfur

The electrons involved in the formation of a chemical bond are called...

• dipoles

• s electrons

• Lewis electrons

• valence electrons

As atoms bond with each other, they

• increase their potential energy, thus creating less-stable arrangements of matter.

• decrease their potential energy, thus creating less-stable arrangements of matter.

• increase their potential energy, thus creating more-stable arrangements of matter.

• decrease their potential energy, thus creating more-stable arrangements of matter.

A chemical bond resulting from the electrostatic attraction between positive and negative ions is called a(n)

• covalent bond

• ionic bond

• charged bond

• dipole bond

Draw the Lewis dot structure for HCl.

Answer explanation

A ____ shows the types and numbers of atoms joined in a single molecule of a molecular compound.

• molecular formula

• chemical formula

• covalent bond

• ionic bond

Name the compound H₂CO₃

• Dihydrogen carbon trioxide

• Carbonic acid

• Carbonous acid

• Hydrogen carbonate

What principle states that atoms tend to form compounds so that each atom can have eight electrons in its outermost energy level?

• rule of eights

• Avogadro principle

• configuration rule

• octet rule

Name the compound Ni(ClO₃)₂

• Nickel(II) Chlorate

• Nickel chloride

• Nickel chlorite

• Nickel peroxide