ionic bonds

what are used to repeat elements

• symbols

• ions

• molecules

elements in a definite proportion(always the same) represent compounds=

• a formula

• a ion

• a diatomic molecule

when an element loses or gains an electron and becomes charged

• ionic bond

• ion

• mass number

positively charged ion

• cation

• anion

negatively charged(non-metal) ion

• anion

• cation

di=

• two

• one

atomic=

• atoms

• ion

when two atoms of the___ element occur bound together

how many diatomic elements

• 7

• 8

• 5

is group 7(halogens) a diatomic molecule (hydrogen, oxygen,nitrogen)

• true

• false