Atom and It's Structure

Atom and It's Structure

Learning Intention

I can calculate the number of proton, neutron and electrons to any given atom

I can write the electron configuration for the first 36 elements.

Multiple Choice

Who established the following atomic model?

• Dalton
• Thomson
• Rutherford
• Bohr

Multiple Choice

Who established the following atomic model?

• Dalton
• Thomson
• Rutherford
• Bohr

Multiple Choice

Who established the following atomic model?

• Dalton
• Thomson
• Rutherford
• Bohr

The Atom

The 'building blocks' of all matter.

Composed of three subatomic particles.

• Protons
• Neutrons
• Electrons

Multiple Choice

Which subatomic particles contains no charge?

• Protons

• Neutrons

• Electrons

Subatomic Particles

Nucleus: protons and neutrons bound in the centre - contains most of the atom's mass.

Subatomic particles in the nucleus are referred to as Nucleons.

Protons and neutrons are almost ideantical in mass.

Electrons are 1800 times smaller than the nucleons.

Multiple Choice

The mass of an atom is define as the:

• total number of neutrons and protons in an atom.

• number of protons in an atom.

• total mass of the neutrons and protons in the atom.

• number of neutrons in an atom.

Dalton described

Elements: materials containing just one type of atom.

Compounds: materials containing different types of atoms in fixed ratios.

Multiple Choice

Chlorine element contains only one type of atom?

• True

• False

Standard way of representing an atom

Mass number = Protons + Neutrons

Atomic number = Number of protons

Number of protons = number of electrons.

Which indicates:

Protons: 13

Electrons: 13

Neutrons: 27 - 23 = 14

Calculate the number of protons, neutrons and electrons for Argon:

Calculated the number of subatomic particles for Uranium:

Isotopes

Atoms that have the same number of protons but different number of neutrons (therefore different mass numbers).

• _{The average atomic mass of elements is the average of all of its isotopes, this is the reason why its a decimal value.}

Multiple Choice

Carbon -12, Carbon-13 and Carbon-14 are isotopes

• True

• False

Carbon-12, Carbon-13 and Carbon-14 are natural isotopes.

Carbon-14 is radioactive