NONMETALS

Which element has a complete valence electron shell?

argon (Ar)

Where are the most reactive nonmetal elements found on the periodic table?

at the top of group 17

Joelle is a manager at a construction company, and she is interested in the chemistry behind the materials they use. She has begun studying the materials used to fill walls. She knows that to keep the temperature inside a room steady the material must be a thermal insulator, and she predicts that materials should not be acidic or else they would dissolve too easily in water. Which is most likely a molecule in a wall-filling material?

C6H6

Any compound that has at least one element from Group 17 is called a

Halide

Looking at the same nonmetal group on the periodic table, how does the reactivity of an element in period 2 compare to the reactivity of an element in period 4?

The period 2 element would be more reactive because the attractive force of protons is stronger when electrons are attracted to a closer electron shell.

Which statement best explains why radon and krypton do not bond easily with other elements?

They have eight electrons in their valence shells, so they are stable without gaining or losing electrons.

Which element is likely to be the most reactive?

fluorine (F)

On the periodic table, the elements known as noble gases are all found in

group 18.

A student is working with four different solid substances: sodium (Na), calcium (Ca), copper (Cu), and iodine (I). Which substance is most likely to break easily into many smaller pieces?

iodine

Of these nonmetals, which one is likely to be the least reactive?

sulfur (S)