Chapter 14 terms

Question 0

Atomic nucleus

Answer 0

The dense, positively charged center of every atom.

Question 1

Atomic mass

Answer 1

The mass of an element’s atoms listed in the periodic table as an average value based on the relative abundance of the element’s isotopes.

Question 2

Atomic number

Answer 2

A count of the number of protons in the atomic nucleus.

Question 3

Atomic symbol

Answer 3

an abbreviation for an element or atom.

Question 4

Electron

Answer 4

An extremely small, negatively charged subatomic particle found outside the atomic nucleus.

Question 5

Element

Answer 5

Any material that is made up of only one type of atom.

Question 6

Group

Answer 6

A vertical column in the periodic table, also known as a family of elements.

Question 7

Isotope

Answer 7

Any member of a set of atoms of the same element whose nuclei contain the same number of protons but different numbers of neutrons.

Question 8

Mass number

Answer 8

The total number of protons and neutrons within an isotope.

Question 9

Neutron

Answer 9

An electrically neutral subatomic particle of the atomic nucleus.

Question 10

Nucleon

Answer 10

Any subatomic particle found in the atomic nucleus. Another name for either a proton or a neutron.

Question 11

Period

Answer 11

A horizontal row in the periodic table.

Question 12

Periodic table

Answer 12

A chart in which all known elements are listed in order of atomic number.

Question 13

Proton

Answer 13

A positively charged subatomic particle of the atomic nucleus.

Question 14

Shell

Answer 14

A region of space around the atomic nucleus in which electrons may reside.

Question 15

Valence electron

Answer 15

An electron located in the outermost occupied shell in an atom that can participate in chemical bonding.