gr 6 oxygen

A substance that remains without any change in its quantity and properties during the chemical reaction

- The gas represents one fifth of the volume of atmosphere.

A slow combination of oxygen with an element in the presence of moisture.

Oxygen is ……………… than air, so it can replace air .

A gas forms 78 % of the air volume.

The oxygen gas is produced plentifully from ……………… during ………………..

……………. and ………….. are from the uses of oxygen gas .

The mass of cleansing wire increases when you burn it G.R

A layer that protects the earth from harmful radiation that comes from sun

- It is a rapid union between oxygen and element that produces heat and light

A gas form 21 % of the air volume.

Catalyst used in preparation of oxygen gas.