Atomic Mass

Atomic Number

Element Symbol

Valance Electrons

Energy Level

100

The atomic mass of calcium.

What is 40.08

100

The atomic number of Oxygen.

What is 8?

100

Tl

What is Thallium?

100

The valance electrons of Krypton.

What is 8?

100

The number of energy levels of Hydrogen.

What is 1?

200

The atomic mass of Lead.

What is 207.2?

200

The atomic number of Potassium.

What is 19?

200

Nb

What is Niobium?

200

The valance electrons of Beryllium.

What is 2?

200

The number of energy levels of argon.

What is 3?

300

The atomic mass of Holmium.

What is 164.93?

300

The atomic number of Silver.

What is 47?

300

Mc

What is Moscovium?

300

The valance electrons of Carbon?

What is 4?

300

The number of energy levels of Cobalt.

What is 4?

400

The atomic mass of Radium.

What is 226?

400

The atomic number of Barium?

What is 56?

400

Re

What is Rhenium?

400

The valance electrons of sulfur.

What is 6.

400

The number of energy levels of Bismuth.

What is 6?

500

The atomic mass of Tungsten.

What is 183.84?

500

The atomic number of Samarium.

What is 62?

500

Er

What is Erbium?

500

The valance electrons of Helium.

What is 2.

500

The number of energy levels of Actinium.

What is 7?