Unit 2: Periodic Table

Question 1

“A” groups, “B” groups, in-between

Answer 1

• Main group elements (representative elements)
• Transition metals
• Inner transition metals (rare earth elements). Includes lanthanides and actinides.

Question 2

Metals, metalloids (semi-metals), and non-metals

Answer 2

• Lower-left, including transition metals.
• Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te), Astatine (At).
• Upper-right.

Question 3

Groups/families, Periods

Answer 3

• Columns numbered 1-8 with A or B.
• Periods numbered 1-7.

Question 4

Group 1A

Answer 4

• Alkali metals, except hydrogen
• Highly reactive

Question 5

group 2A

Answer 5

• Alkaline earth metals
• Highly reactive

Question 6

Group 7A

Answer 6

• Halogens
• Highly reactive
• Exists as diatomic molecules (X2)

Question 7

Group 8A

Answer 7

• Noble gases/inert gases
• Very nonreactive
• Exists as monatomic gases.

Question 8

Naming for other main groups

Answer 8

named for first element in group.

Question 9

How to calculate atomic mass

Answer 9

(Fractional abundance of isotope 1 x mass of isotope 1)
+ (fractional abundance of isotope 2 x mass of isotope 2) . . .

Question 10

What is atomic mass?

Answer 10

Average of mass of naturally occurring isotopes weighted according to their fractional abundance.