Scientists
Subatomic Particles
Isotopes
What's in the Box
Periodic Table
100

Discovered the "Plum Pudding" Model of the atom

Who is Thomson?

100

This particle has a positive charge and a mass of 1 amu.

What is protons?

100

The mass number of Carbon-14.

What is 14?

100

The symbol for Magnesium.

What is Mg?

100

The name for column.

What is group?

200

The atomic model that consists of a nucleus surrounded by electrons orbiting in shells.

What is the Bohr Model?

200

This particle has a neutral charge and has a mass of 1 amu.

What is neutrons?

200

The number of neutrons in Sodium-22.

What is 11?

200
The atomic number of Oxygen.

What is 8?

200

The name for row.

What is period?

300

This scientist proposed that atoms are tiny particles that make up all matter.

Who is Democritus?

300

This particle has a negative charge and has a mass of 0 amu.

What is electrons?

300

The number of protons in Calcium-41.

What is 20?

300

The atomic mass of Aluminum.

What is 26.982?

300

Column one of the periodic table.

Alkali Metals

400

This atomic theory proposed that matter is composed of atoms.

What is Dalton's Atomic Theory?

400

This particle is in the outermost shell of an atom?

What is valence electrons?

400

The number of neutrons in Neon-22.

What is 12?

400

The element for the symbol Hg.

What is Mercury?

400

Columns 17 of the periodic table.

What is the Halogens?

500

This scientist proposed an idea about the atomic model and was believed for 2000 years but was incorrect.

Who is Aristotle?

500

These two particles make up the nucleus of an atom.

What are protons and neutrons?

500

The mass number of Lithium-8.

What is 8?
500

The number of electrons in Boron.

What is 5?

500

Column 18 of the periodic table.

What is the Noble Gases?

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