Unit 4 Electrons Quiz

An atom has electrons in the 1s orbital which is closest to the nucleus. The same atom also has electrons in the 2s orbital. Which electrons are higher energy?

• 1s

• 2s

How many energy levels does Calcium have? Hint - it has to do with what period Ca is in.

• 1

• 2

• 3

• 4

What is the maximum number of energy levels an atom can have?

• 1

• 7

• 5

• 3

What does the 2 in sublevel 1s² represent?

• The number of electrons in the suborbital

• The shape of the suborbital

• The number of neutrons in the suborbital

• The energy level of the electrons.

What does the 1 in sublevel 1s² represent?

• The number of electrons in the suborbital

• The shape of the suborbital

• The number of neutrons in the suborbital

• The energy level of the electrons.

Which element is this? 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶

• Fr

• U

• Xe

• Lr

Which element is this? 1s²2s²2p⁶3s²3p²

• Fr

• Si

• Xe

• Ca

What is the correct electron configuration of Carbon?

• 1s²2s²2p²

• 1s²2s²2p⁶3s²3p⁵

• 1s²2s²

• 1s²2s²2p⁶

What is the correct electron configuration of Lithium?

• 1s²2s²

• 1s²2s²2p⁶

• 1s²2s¹

• 1s²

What is the correct electron configuration of Magnesium (Mg) using noble gas shorthand?

• [Ne]3s²

• [Ne]2p⁶

• [Beanium]NoNotThis¹⁰

• [He]3s²