ATI Chemistry Practice Test 2

Question 1

What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-4 M?

Accepted Answer

4

Answer

pH equals the negative log of [H+], so -log(1x10^-4) = 4.

Question 2

Which type of bond forms when electrons are transferred from a metal to a nonmetal?

Accepted Answer

Ionic

Answer

Ionic bonds form when electrons transfer from a metal to a nonmetal, creating charged ions.

Question 3

What is the atomic number of an element determined by?

Accepted Answer

Number of protons

Answer

The atomic number equals the number of protons in an atom's nucleus.

Question 4

A solution with a pH of 9 is best described as:

Accepted Answer

Basic

Answer

A pH above 7 indicates a basic (alkaline) solution.

Question 5

Which subatomic particle has a negative charge?

Accepted Answer

Electron

Answer

Electrons carry a negative charge and orbit the nucleus.

HESI (ATI) Practice Test