Chemistry Unit grade 9

Front

Nucleus

Back

The tiny part at the centre of an atom

Front

Chemical Property

Back

A property observed when the substance reacts with another and is changed into something else.

Front

Malleability

Back

The ability to be bent or beaten into sheets.

Front

Element

Back

A purse substance that can not be decomposed chemically in simplier substances, because it contains onlt one "TYPE" of atoms.

Front

Periodic Table

Back

A table where the elements are organzied to show their properties and similarities.

Front

Atomic Number

Back

The number of protons in the nucleus of atoms of an element.

Front

Atomic Mass

Back

The mass of an atom of an element; equals the number of protons plus neutrons.

Front

Period

Back

A row in the periodic table

Front

Alkali Metals

Back

family in the first column of the periodic table

Front

Alkali Earth Metals

Back

Family in the second column of the period table.