Section 2 Atoms

Question 1

small particles that make up all matter; basic building blocks of all matter

Answer 1

atoms

Question 2

the amount of matter in an object

Answer 2

mass

Question 3

anything that takes up space and has mass

Answer 3

matter

Question 4

a negatively charged subatomic particle found outside of the nucleus

Answer 4

electron

Question 5

the center of an atom where the protons and neutrons are located

Answer 5

nucleus

Question 6

a neutral (not charged) subatomic particle; one of the two particles that make up an atomic nucleus

Answer 6

neutron

Question 7

a positively charged subatomic particle; one of the two particles that make up an atomic nucleus

Answer 7

proton

Question 8

a diffuse region of negative charge surrounding an atomic nucleus; describes the region in which electrons are located (exact location uncertain)

Answer 8

electron cloud

Question 9

electrons that occupy the outermost regions, those farthest from the nucleus of an atom

Answer 9

valence electrons

Question 10

a substance that is composed of a single type of atom

Answer 10

element

Question 11

how many protons an element has

Answer 11

atomic number

Question 12

a chemical that contains at least two different types of atoms in a fixed ratio

Answer 12

compound

Question 13

any substance that has a definite, fixed chemical composition

Answer 13

chemical

Question 14

attractive forces that hold atoms together

Answer 14

chemical bonds

Question 15

an exact number of atoms of one type of element or more than one type of element that held together by covalent bonds

Answer 15

molecule