Deck 2: Basic Chemistry

Question 1

Chemistry is the study of _____.

A) chemicals
B) biological functions
C) matter
D) chemical reactions

Answer 1

matter

Question 2

An element is composed of atoms that:

A) have the same number of positive charges in their nuclei.
B) have a greater number of positive than negative charges in their nuclei.
C) have a lesser number of positive than negative charges in their nuclei.
D) have no positive charges in their nuclei.

Answer 2

have the same number of positive charges in their nuclei.

Question 3

Which of the following element groups make up 96% of the body's weight?

A) oxygen, carbon, hydrogen, and nitrogen
B) oxygen, carbon, calcium, and sodium
C) oxygen, carbon, hydrogen, and sodium
D) oxygen, nitrogen, potassium, and iron

Answer 3

oxygen, carbon, hydrogen, and nitrogen

Question 4

Which three subatomic structures comprise an atom?

A) protons, electrons, and matter
B) protons, neutrons, and electrons
C) ions, neutrons, and electrons
D) protons, ions, and the nucleus

Question 5

Which of the following statements are true?

A) Cations are negatively charged ions, and anions are positively charged ions.
B) The transfer of electrons is responsible for the formation of ions (cations and anions).
C) The atomic number refers to the number of electrons within the atom.
D) Chemical bonds are formed when chemical compounds bond with each other.

Question 6

What causes an ionic bond?

A) the transfer of energy from one nucleus to another nucleus
B) polarity
C) the transfer of electrons between atoms
D) the sharing of electrons by the outer shells of the atoms

Question 7

Which of the following atoms always forms covalent bonds?

A) carbon
B) oxygen
C) nitrogen
D) carbohydrate

Question 8

When two or more atoms bond, they form a(n) ________.

A) ion
B) electrolyte
C) neutron
D) molecule

Question 9

Which of the following substances is most abundant in the human body?

A) oxygen
B) water
C) sodium
D) carbon dioxide

Question 10

Which of the following would be considered a base substance?

A) lemon juice
B) household ammonia
C) stomach contents
D) black coffee