GROUP PRACTICE MIX-ELECTRONS IN BOHR ENERGY LEVELS

Atomic number represents which subatomic particle?

• electrons

• protons

• neutrons

All of the elements in a period have the same number of _____.

• energy levels

• valence electrons

• protons

• electrons

All of the elements in a group have the same number of _____.

• energy levels

• valence electrons

• protons

• electrons

Which pair of elements has the most similar properties?

• Be and B

• O and S

• H and Hg

• Na and F

How many electrons can the first energy level hold?

• 1

• 2

• 8

• Unlimited

How many electrons can the second and third (for our intents and purposes) energy levels hold?

• 1

• 2

• 8

• Unlimited

What is the name of this element?

• Helium
• Hydrogen
• Argon
• Silver

An atom has a full first energy level and 7 electrons in its second level. How many electrons does this atom have?

• 2

• 7

• 9

• Need more information

An atom has a full first and second energy level and 8 electrons in its third level. This atom is neutral. What element is this atom?

• Chromium (Cr)

• Argon (Ar)

• Magnesium (Mg)

• Need mor information

What is the atomic number of this atom?

• 2
• 4
• 6
• none of the above