TEAS Science: Chemistry and Physical Science 2

Question 1

Which subatomic particle determines the identity of an element?

Accepted Answer

Proton

Answer

The number of protons (atomic number) defines which element an atom is.

Question 2

What is the pH of a neutral solution at 25°C?

Accepted Answer

7

Answer

A neutral solution has a pH of 7, where hydrogen and hydroxide ion concentrations are equal.

Question 3

Which type of bond involves the sharing of electron pairs between atoms?

Accepted Answer

Covalent bond

Answer

Covalent bonds form when atoms share electron pairs.

Question 4

A change from a liquid directly to a gas is called what?

Accepted Answer

Vaporization

Answer

Vaporization is the phase change from liquid to gas.

Question 5

Which law states that energy cannot be created or destroyed?

Accepted Answer

Law of conservation of energy

Answer

The law of conservation of energy says energy only transforms between forms.

TEAS Practice Test