Periodic Table (Physical Science)

Atomic number is equal to the number of...

• Protons

• Neutrons

• Electrons

What is the atomic number of Calcium?

If I have 8 protons and 10 neutrons, what element do I have?

• Oxygen

• Neon

• Something else

If I have 8 protons and 10 neutrons, what is the mass number?

• 18
• 80

• 16

• 10

In a neutral atom of magnesium (Mg), how many electrons are there?

If an isotope of calcium (Ca) has a mass number of 48, how many neutrons does it have?

• 28

• 20

• 48

Different versions of the same element. Same number of protons, different number of neutrons.

• Isotope

• Ion

• Dalton's Model

• Groups

Periods on the periodic table are...

• Horizontal rows

• Vertical columns

Groups on the periodic table are...

• Horizontal rows

• Vertical columns

Periods on the periodic table tell us...

• The number of valence electrons

• How many energy levels the element has