Semester 2 Exam 2024-2025

The electrons that are lost, gained, or shared in chemical bonds are called ____________.

• valence electrons

• chemical electrons

• Lewis electrons

• none of the above

Matter that has a definite volume and a definite shape is a _______________.

• solid

• liquid

• gas

• plasma

Which of the following elements would be the most reactive?

• Iodine

• Silicon

• Silver

• Argon

The chemical bond formed when two atoms share electrons is called a(n)

• Covalent bond

• Ionic bond

• Metallic bond

• Electron bond

CaCO₃ is an example of which type of matter?

• Element

• Compound

• Homogeneous mixture

• Heterogeneous mixture

Which of the following is NOT an example of covalent bonding?

• H₂O

• NaF

• NH₃

• O₂

Boron, carbon, nitrogen, and oxygen are all members of the same ____________.

• Family

• Period

• Group

• Valence level

In which phase of matter are the molecules of the substance farthest apart from each other?

• solid

• liquid

• gas

• crystal

The properties of a compound are __________ the properties of the elements that form it.

• Similar to

• Different from

• Identical to

• Derived from

Which atoms are most likely to form covalent bonds?

• metal atoms that share electrons

• metal atoms that share protons

• nonmetal atoms that share electrons

• nonmetal atoms that share protons