Nonmetals Assignment

A sample of iodine is easiest to ship as a powder because it is _______, making it easy to break into small pieces.

• brittle

• volatile

• thermally insulating

Helium is less ______ than the elements that make up the air we breathe, so a balloon filled with helium will float in air.

• dense

• brittle

• electrically insulating

Plastic is a compound of nonmetallic elements, so its _________ properties make it a popular coating for electric wires to prevent the current from escaping.

• electrically insulating

• brittle

• dense

Which nonmetal is the most reactive out of the following: neon, selenium, fluorine.

• Neon

• Selenium

• Fluorine

Answer explanation

Top, right of nonmetals will be most reactive -- Fluorine.

Which nonmetal is the least reactive out of the following: neon, selenium, fluorine.

• Neon

• Selenium

• Fluorine

Answer explanation

Groups (moving down) - decrease reactivity

Periods (moving from left to right) - increase reactive

Choose the nonmetallic elements from the list. Check all that apply. (Hint: there are three that should be checked)

• carbon

• oxygen

• boron

• polonium

• argon

Identify which elements are halogens (group 17).

• Astatine (At)

• Nitrogen (N)

• Krypton (Kr)

• Chlorine (Cl)

• Sulfur (S)

Identify which elements are noble gases (group 18).

• Astatine (At)

• Nitrogen (N)

• Krypton (Kr)

• Chlorine (Cl)

• Sulfur (S)

Which nonmetals have similar chemical properties (hint: groups)? Check all that apply.

• sulfur

• nitrogen

• selenium

• oxygen

• carbon

Which nonmetal is the most reactive out of the following: bromine, chlorine, & iodine.

• bromine

• chlorine

• iodine

Answer explanation

As you move down the group for nonmetals, they become less reactive. Chlorine is above iodine and bromine in their group.