ELEMENTS & ATOMS.

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Presentation transcript:

ELEMENTS & ATOMS

What is Matter?

Matter is made up of elements So what is an element

An element Is a pure substance made of only one kind of atom Then what is an ATOM

An ATOM Is the smallest particle of a substance that has all the properties of that substance

For example Gold is made of atoms of gold For example Gold is made of atoms of gold. (Gold is one of our elements)

All gold atoms are alike they are not like silver atoms or any other element

ATOM Are made up of Electrons Protons And Neutrons

ATOM

Proton Are positively ( +) charged particles in the nucleus of an atom. (The number of protons tells what kind of atom it is. )

Neutrons Are also in the nucleus of an atom They are not charged (Neutral) They add mass to the atom The number of neutrons does not change what kind of atom it is.

Electrons Are negatively charged particles (-). Electrons are in spaces called clouds outside the nucleus Electrons determine an atom’s chemical properties