Gcse additional chemistry

An ion is an atom or a group of atoms with a positive negative neutral( positive, negative, neutral ) charge or a negative positive neutral( negative, positive, neutral ) charge.

Sodium gives a yellow/orange lilac brick-red blue-green( yellow/orange, lilac, brick-red, blue-green ) flame, potassium gives a lilac yellow/orange brick-red blue-green( lilac, yellow/orange, brick-red, blue-green ) flame, calcium gives a brick-red yellow/orange lilac blue-green( brick-red, yellow/orange, lilac, blue-green ) flame and copper gives a blue-green yellow/orange lilac brick-red( blue-green, yellow/orange, lilac, brick-red ) flame.

protons relative mass is 1 +1( 1, +1 ), neutrons relative masses 1 0 -1( 1, 0, -1 ) and electrons relative mass is -1 1 0( -1, 1, 0 )