Chapter 2 Vocab

Question 1

Matter

Answer 1

Anything that occupies space and mass

Question 2

Element

Answer 2

A substance composed of atoms that cannot be broken down into smaller, simple components

Question 3

Compound

Answer 3

A molecule containing more than one element

Question 4

Mass

Answer 4

A measurement of the amount of matter an object contains

Question 5

Atom

Answer 5

Smallest particle that can contain the chemical properties of an element

Question 6

Periodic table

Answer 6

Chart of all chemical elements currently known, organized by their properties

Question 7

Molecule

Answer 7

A particle that contains more than one atom

Question 8

Compound

Answer 8

A molecule containing more than one element

Question 9

Atomic number

Answer 9

Number of protons in the nucleus of a particular element

Question 10

Mass number

Answer 10

A measurement of the total number of protons and neutrons in an element

Question 11

Isotopes

Answer 11

Atoms of the same element with different numbers of neutrons

Question 12

Radioactive decay

Answer 12

Spontaneous release of material from the nucleus of radioactive isotopes

Question 13

Half-life

Answer 13

Time it takes for one-half of an original radioactive parent atom to decay

Question 14

Covalent bond

Answer 14

The bond formed when elements share electrons

Question 15

Ionic bond

Answer 15

Chemical bond between two ions of opposite charges

Question 16

Hydrogen bond

Answer 16

A weak chemical bond that forms when hydrogen atoms that are covalently bonded one atom are attracted to another atom on another molecule