Chemistry Unit Review

How many protons does carbon have?

• 2

• 4

• 6

• 8

How many valence electrons does carbon have?

• 2

• 4

• 6

• 8

How many neutrons does sodium (Na) have?

• 11

• 12

• 22

• 23

How many valence electrons does nitrogen (N) have?

• 5

• 7

• 14

• 15

Hydrogen, lithium, and sodium -

• are in the same group and have the same amount of energy levels

• are in the same period and have the same amount of valence electrons

• are in the same group and have the same amount of valence electrons

• are in the same period and have the different amounts of energy levels

Valence electrons determine -

• the atomic mass of an atom of an element

• the amount of positive charges within an atom

• the abundance of an element

• the reactivity of an atom of an element

Elements on the periodic table are organized according to -

• Protons

• Atomic Mass

• Neutrons

• Electrical charge

Protons can be used to -

• determine the identification of an element

• indicate the element's atomic number

• show the quantity of total electrons in an atom

• all of the above

Which of the following is a true statement?

• Protons = positive; Neutrons = negative; Electrons = No charge

• Protons = positive; Neutrons = No Charge; Electrons = No charge

• Protons = positive; Neutrons = No Charge; Electrons = Negative

• Protons = positive; Neutrons = Negative; Electrons = Negative

The most abundant type of elements on the periodic table are

• metals

• non-metals

• metalloids

• amorphous solids