1.The elements in this group are extremely reactive and can never be found in nature in
their pure form.
a. Nitrogen group
b. Carbon group
c. Boron group
d. Alkali metals

2. What do you call the outermost filled orbital of an atom?

a. Valence shell

b. Valence electron

c. Outer shell

d. Covalent bond

3. Which of the following is true about the Oxygen group?

a. They are often called halides

b. They are a combination of non-metals and metalloids

c. They are extremely reactive

d. They are all metals

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