TEAS Practice Test: Video 7 Answers (25 Questions)

Question 1

Which type of chemical bond involves the sharing of electrons between atoms?

Accepted Answer

Covalent bond

Answer

Covalent bonds form when atoms share pairs of electrons, commonly between nonmetal atoms.

Question 2

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 3

Which of these is a chemical change rather than a physical change?

Accepted Answer

Rusting iron

Answer

Rusting forms a new substance (iron oxide), making it a chemical change.

Question 4

What is the term for the amount of a substance measured in moles per liter of solution?

Accepted Answer

Molarity

Answer

Molarity (M) is defined as the number of moles of solute per liter of solution, expressed as mol/L or M.

Question 5

A patient's blood sample is found to have a pH of 7.28. This condition is called:

Accepted Answer

Acidosis

Answer

Normal blood pH is 7.35–7.45. A pH of 7.28 is below normal, indicating acidosis — too much acid (H⁺) or too little bicarbonate in the blood.