Chemistry quiz

Draw the electron dot structure for the element oxygen.

• C

• O

• N

• H

How many valence shells does an atom of chlorine have?

• 3

• 5

• 7

• 2

What is the electron configuration of carbon?

• 1s2 2s2 2p2

• 1s2 2s1 2p2

• 1s2 2s1 2p3

• 1s2 2s2 2p3

What is the maximum number of valence electrons an atom can have?

• 4

• 10

• 8

• 6

How do you determine the number of valence electrons in an atom?

• By looking at the group number of the element in the periodic table.

• By examining the number of neutrons in the atom

• By counting the number of protons in the nucleus

• By looking at the atomic mass of the element

Draw the electron dot structure for the element sodium.

• Cl

• Na+

• Na·

• Na

What is the valence shell of an atom?

• The nucleus of the atom

• Outermost shell of electrons

• The innermost shell of electrons

• The protons and neutrons of the atom

What is the electron configuration of nitrogen?

• 1s2 2s2 2p3

• 1s2 2s2 2p2

• 1s2 2s1 2p4

• 1s2 2s2 2p4

Explain the concept of valence electrons.

• Valence electrons are not involved in chemical bonding

• Valence electrons are the electrons in the innermost shell of an atom

• Valence electrons are the electrons in the nucleus of an atom

• Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Draw the electron dot structure for the element fluorine.

• Fe

• F

• O

• H