The Periodic Table

What happens to the mass of atoms as you move from left to right and downwards in the Periodic Table?

• The mass increases

• The mass decreases

• The mass remains the same

• The mass fluctuates

Explain the relationship between atomic number and the number of protons in an element.

Tags

Understanding

An atom has no overall charge because the number of protons is the same as the number of ___.

Which subatomic particle has a positive charge?

• Proton

• Electron

• Neutron

• Photon

Describe how the atomic number changes as you move across the Periodic Table.

Tags

Understanding

The atomic number of an element tells you how many ___ it contains.

Analyze why an atom of hydrogen has less mass than an atom of sodium.

Tags

Analyzing

What does the atomic mass of an element indicate?

• The volume of the atom

• The mass of the atom

• The number of protons in the atom

•  The density of the atom

Which element has an atomic mass of 12?

• Hydrogen

• Carbon

•  Sodium

• Iron

What is the density of iron according to the excerpt?

• 0.97 g/cm³

• 1 g/cm³

• 7.87 g/cm³

• 10 g/cm³