Science

what is noble gasses?

• exist as single atoms and do not join up with each other to form molecules.

• is the most abundant element on Earth's crust.

• consist of atoms or molecules arranged in a regular, organized structure.

• is the basis of all organic compounds in living things.

The elements are grouped according to their _______

• aluminium

• carbon

• atomic number

• oxygen

what is crystals?

• is the most abundant element on Earth's crust.

• consist of atoms or molecules arranged in a regular, organized structure.

• The elements are grouped according to their atomic number.

• is a soft, light metal that is a compound obtained from bauxite

what is compound?

• protects life from harmful radiation from the Sun

• protects life from harmful radiation from the Sun

• molecules consist of two or more atoms.

• molecules consist of two or more atoms.

what is Aluminium (AI) ?

• is the most abundant element in the universe.

• is a soft, light metal that is a compound obtained from bauxite.

• is a pollutant that makes the cities dirtier and building damaged.

• tells how many protons are in the nucleus.

what is hydrogen?

• tells how many protons are in the nucleus.

• exist as single atoms and do not join up with each other to form molecules.

• is a pollutant that makes the cities dirtier and building damaged.

• is the most abundant element in the universe.

what is atomic number?

• tells how many protons are in the nucleus.

• protects life from harmful radiation from the Sun

• The chemical name of common salt is sodium chloride

• is the basis of all organic compounds in living things.

The chemical name of common salt is ___________

• nitrogen oxide

• sodium chloride

• acid rain

• hydrogen

what is acid rain?

• consist of two or more atoms.

• is formed when sulphur dioxide and nitrogen oxide mix with water in the atmosphere

• is a pollutant that makes the cities dirtier and building damaged.

• grouped according to their atomic number.

what is elements?

• are grouped according to their atomic number.

• A chemical formula consists of chemical symbols and numbers to indicate how many atoms of eachelement make up a molecule.

• is the most abundant element on Earth's crust.

• protects life from harmful radiation from the Sun