Explain the reaction of non-metals with oxygen

Non-metals react with oxygen in the air to produce non-metal oxides.

When non metals react with oxygen they form acidic oxides. They turn blue litmus paper to red. Examples are

carbon + oxygen → carbon dioxide

sulphur + oxygen → sulphur dioxide

These oxides dissolve in the water in the clouds to form acid rain.  Acid rain damages rocks and buildings, and harms wildlife.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.