8th Science Ch.3 Vocab

Question 1

The central core of an atom which contains protons and neutrons.

Answer 1

Nucleus

Question 2

A small particle in the nucleus of the atom, with no electrical charge.

Answer 2

Neutron

Question 3

Small, positively charged particles that are found in the nucleus of an atom

Answer 3

Protons

Question 4

The basic particle from which all elements are made; the smallest particle of an element that has properties of that element.

Answer 4

Atom

Question 5

Elements in the same vertical column of the periodic table; also called family

Answer 5

Group

Question 6

The gradual wearing away of a metal element due to a chemical reaction

Answer 6

Corrosion

Question 7

A one- or two- letter representation of an element

Answer 7

Chemical symbol

Question 8

The spontaneous emission of radiation by an unstable atomic nucleus

Answer 8

Radioactivity

Question 9

A horizontal row of elements in the periodic table

Answer 9

Period

Question 10

The ease and speed with which an element combines, or reacts, with other elements and compounds

Answer 10

Reactivity

Question 11

An arrangement of the elements showing the repeating pattern of their properties

Answer 11

Periodic table