Atoms Vocabulary

Any atom or group of atoms with a positive charge.

​A subatomic particle of the nucleus of an atom that is without charge and contributes to the mass of an atom.

The tiny, very dense, positively charged region in the center of an atom made up of protons and neutrons

A negatively charged subatomic particle of the electron cloud; involved in the formation of chemical bonds.

A positively charged subatomic particle of the nucleus of an
atom that contributes to the mass of the atom.

​Any atom or group of atoms with a negative charge.

A model that lists the three subatomic particles that make up
atoms; gives the mass and charge of each subatomic particle.

The smallest unit of an element that has all of the properties of that element; contains a nucleus within a surrounding electron cloud.

All of the area inside an atom surrounding the nucleus where electrons are found

Modification of Rutherford's Model. Shows electrons on fixed orbitals.

Glass tube containing gas at low pressure with electrodes at each end. When connected to an electric current, cathode ray is produced.

Bohr's Model

Cathode Ray

All of the area inside an atom surrounding the nucleus where electrons are found

​Tiny particles called alpha-particles were directed at a thin sheet of gold foil lead to the discovery of the atomic nucleus.

Same atomic number with different atomic mass due to different number of neutrons.

Match

Match the following

• Electron Cloud

• Ion

• Cathode Ray

• Rutherford Experiment

• Isotope

Area surrounding nucleus

Different number of protons & electrons

Ray produced by electrical current

Discovery of atomic nucleus

Same atomic number different neutrons

• Area surrounding nucleus

• Different number of protons & electrons

• Ray produced by electrical current

• Discovery of atomic nucleus

• Same atomic number different neutrons

Match

Match the following

• Proton

• Anion

• Cation

• Nucleus

Positively charged subatomic particle

Any atom(s) with a negative charge

Any atom(s) with a positive charge

Positively charged center of an atom

• Positively charged subatomic particle

• Any atom(s) with a negative charge

• Any atom(s) with a positive charge

• Positively charged center of an atom

Match

Match the following

• Atomic Model

• Atom

• Electron

• Neutron

Model lists three subatomic particles

Smallest unit of an element

Negatively charged, contributes to bond

Neutrally charged,

• Model lists three subatomic particles

• Smallest unit of an element

• Negatively charged, contributes to bond

• Neutrally charged,