Unit exam 8th: Parts of the atom, electronic configurations

The electron configuration of an atom is 1s²2s²2p⁶.  The number of electrons in the atom is 

• 3
• 6
• 8
• 10

What atom matches this electron configuration?
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• Zinc
• Copper
• Nickel
• Germanium

What electron configuration matches an oxygen atom?

• 1s²2s⁴2p²

• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

The electron configuration of an atom is 1s²2s²2p⁶.  The number of electrons in the atom is 

• 3
• 6
• 8
• 10

When atoms are neutral is because...

• They have 3 particles

• Neutrons and protons = 0

• They have equal numbers of protons and electrons

• They have a pH of 7

An atom with a charge of -2 will have...

• 2 more electrons than protons

• 2 more neutrons than electrons

• 2 more protons than electrons

• 2 electrons less than protons

Purple color represents

• metals
• nonmetals
• metalloids

An atom that has the electron configuration of 1s²2s²2p⁶3s²3p⁶4s²3d⁵ is in block

• s

• p

• d

• f

What atom matches this electron configuration?
1s²2s²2p⁶3s²

• Neon
• Magnesium
• Aluminum
• Potassium

How many electrons does Si contain? (click to see image)

• 14
• 28
• 2
• 4