Atoms

1 A compound contains:

• A only one type of atom.

• B only one element.

• C only two elements joined together.

• D at least two elements joined together.

All mater is made up of

• compounds

• atoms

• gases

• oxygen

Oxygen, argon, nitrogen are examples of

• compounds

• liquids

• elements

• metals

there are only____ naturally occurring elements

• 60

• 70

• 80

• 90

The only compound in the air we breath is

__________________ _________________________

Mention an element in the air we breath

________________

When elements are not joined together they form a ______________

Number of tablets added in an experiment is _____________data

• qualitative and continuous

• quantitative and discrete

• approximate and discrete

• qualitative and discrete

The temperature of water is

• continuous and discrete

• quantitative and discrete

• qualitative and continuous

• quantitative and continuous

1 Which of the following particle diagrams show molecules of a mixture of elements?

• A

• B

• C

• D