6.1 Atoms

The smallest part of any element. Made up of protons, neutrons and electrons.

• Atom

• AMU

• Ion

• Isotope

A substance that cannot be split into anything simpler.

• Element

• Compound

• Molecule

How many elements found naturally on Earth?

• 25 elements

• 92 elements

• 118 elements

How many elements did the scientists made?

• 25 elements

• 92 elements

• 118 elements

Similar elements have ...................... properties.

• different

• similar

Different elements are made of ............................... atoms.

• different

• similar

Could you go on cutting a piece of matter into smaller and smaller pieces forever? Who answered ‘yes that matter completely fills its space.

• Zeno.

• Leucippus and Democritus.

• Indians.

Who said that matter is divided into tiny separate bits – atoms – with empty space between.

• Zeno.

• Leucippus and Democritus.

• Indians.

Who said that “Each element had its own type of atom”. * Atoms could not be split up.

• Zeno.

• Leucippus and Democritus.

• Indians.

Who collected evidence from his own investigations, and from other scientists by saying that “matter is made up of atoms”

• Zeno.

• John Dalton

• Indians.