Periodic Table
Symbolism
About atoms
Why weight?
100

The creator of the periodic table in 1869.

Who is Dmitri Mendeleev?

100

The chemical element for the symbol P.

What is the element Phosphorus?

100

Atoms are made of extremely tiny particles.

What are protons, neutrons, and electron?

100

Has an atomic weight of 1.00.

What is hydrogen?

200

A chart containing information about the atoms that make up all  matter

What is the periodic table?

200

The chemical element for the symbol Fe.

What is iron?

200

 A negatively charged particle.

What are electrons?

200

Has an atomic weight of 15.997/16.0.

 What is oxygen?

300

 A substance made up of only one type of atom.

What is an element?

300

The chemical element for the symbol Ag.

What is the element silver?

300

A positively charged particle.

  

What are protons?

300

Has an atomic weight of 12.00.

What is carbon?

400

The horizontal row of the periodic table.

What is period?

400

The chemical element for the symbol Pb.

What is the element Lead?

400

Protons and neutrons are in the center of the atom.

What is a nucleus?

400

Has an atomic weight of 18.998

What is Fluorine?

500

Elements with similar properties.

What is a group?

500

The chemical element for the symbol O.

What is oxygen?

500

Atoms of the same element with different numbers of neutrons.

What are isotopes?

500

Has an atomic weight of 40.078.

What is calcium?