chemistry methods and terms

Protons charge, mass and location

+1, 1, nucleus

Neutrons charge, mass and location

0, 1, nucleus

Electrons charge, mass and location

-1, 1/1840, shells

Atomic number

Number of protons

Mass number

Total number of protons + neutrons

How do u calculate the neutrons

Mass number - atomic number

Element

Substance made up of only one type of atom

Ion

An ion is a charged particle formed when an atom loses or gains electrons to achieve a full outer shell

How are positive ions formed?

Lose outer shell electrons to become stable

How are negative ions formed?

Gain outer shell electrons to become stable

Group number

Number of outer shell electrons

What do you notice about electron structure of noble gases?

The order shell of electrons is always full (sometimes call group 0) so stable

Very unreactive or inert

What do you notice about electron structure of noble gases?

The order shell of electrons is always full (sometimes call group 0) so stable

Very unreactive or inert

Malleable

Can be hammered into shape

Ductile

Can be drawn out into wires

Compound

A substance that consists of two or more elements chemically combined

Molecule

A particle that consists of two or more atoms chemically bonded together