Periodic Table: First 20

Carbon has which chemical symbol?

• Ca

• C

• B

• R

Potassium has which chemical symbol?

• P

• Po

• K

• S

Sulfur's chemical symbol is _____, while Silicon's is _______.

• S, Si

• Si, S

• Su, Si

• Si, Su

The number in the top left corner is the:

• atomic number

• atomic mass

• mass number

• nucleus number

The number at the bottom is the:

• atomic number

• atomic mass

• mass number

• nucleus number

The chemical symbol for sodium is:

• S

• So

• Na

• Sd

The chemical symbol for magnesium is:

• M

• Mg

• Mn

• Ma

The number of ________________ determine the identity of the atom.

• electrons

• neutrons

• protons

• nuclei

________________ orbit the nucleus.

• protons

• neutrons

• electrons

• magnets

The nucleus is made up of:

• protons

• neutrons

• electrons

• protons and neutrons