The history of the atom
Parts of the atom
More about the atom
The periodic table
More about the periodic table
100

He combined the idea of elements with the Greek theory of the atom to form a 4 part atomic theory still used today.

John Dalton

100

This is the center portion of the atom where the protons and neutrons are located.

Nucleus

100

All matter is made up of these.

Atoms

100

This is a chart made up of elements.

The periodic table

100

Non-metals are located on this side of the periodic table.

Right side

200

He discovered negatively charged particles, electrons, which are part of every atom.

JJ Thomson

200

These are positively charged particles of an atom.

Protons

200

The number of protons in the nucleus of an atom.

Atomic number of an element

200

This is a substance that cannot be broken down into simpler substances.

An element

200

This element is on the "wrong" side of the periodic table, according to its characteristics.

Hydrogen

300

He discovered the nucleus of an atom.

Ernest Rutherford

300

These subatomic particles are found OUTSIDE of the nucleus.

Electrons

300

The number of neutrons PLUS the number of protons.

Mass number/atomic mass/atomic weight of an element

300

This is a characteristic of metals that allows them to be able to be drawn (pulled/stretched) into wires.

Ductile

300

This characteristic of metals allows it to be able to be hammered or rolled into sheets.

Malleable

400

He discovered the electron cloud and energy levels (orbitals) of an atom.

Niels Bohr

400

These subatomic particles have no charge and are found in the nucleus of an atom.

Neutrons

400

This is how the periodic table is arranged - or how the periodic table is organized.

By increasing the atomic number

400

Metalloids are able to conduct electricity, but not as well as metals. This term means to be able to partially conduct electricity.

Semiconductor

400

What is the lewis dot diagram for bromine


500

Father of the atomic bomb

J. Robert Oppenheimer

500

This is another name for the energy levels of an atom, where the electrons are located.

Orbitals

500

These have the same number of protons but different number of neutrons.

Isotopes of an element

500

This element is the only metal that is liquid at room temperature, not solid.

Mercury

500

What is the bohr/element model for Na1+?