Element Information Vocabulary

Question 1

The smallest piece of an element that still represents that element.

Answer 1

Atom

Question 2

Small area in the center of the atom that contains most of its mass and positive charge.

Answer 2

Nucleus

Question 3

A particle with one negative charge.

Answer 3

Electron

Question 4

An atomic particle that has one positive charge.

Answer 4

Proton

Question 5

Neutral particle in the nucleus of an atom.

Answer 5

Neutron

Question 6

The number of protons in an atom.

Answer 6

Atomic Number

Question 7

The sum of the number of protons and neutrons in an atom.

Answer 7

Mass Number

Question 8

Atoms of the same element that have different numbers of neutrons.

Answer 8

Isotopes

Question 9

The average mass of the element’s isotopes.

Answer 9

AVERAGE ATOMIC MASS (Relative Atomic Mass)

Question 10

An area around an atomic nucleus where an electron is most likely to be located.

Answer 10

Electron Cloud

Question 11

An atom that is no longer neutral because it has lost or gained valence electrons.

Answer 11

Ion

Question 12

Elements that spontaneously emit radiation.

Answer 12

Radioactive

Question 13

A process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation.

Answer 13

Nuclear Decay