Periodic Trends

Question 1

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

Revolt · Accepted Answer

group 18.

Question 2

Which element has a complete valence electron shell?

Revolt · Accepted Answer

argon (Ar)

Question 3

What property do all of the group 18 elements have that makes them stand out from other elements?

Revolt · Accepted Answer

They are very unlikely to bond with any element, whether it is metallic or not.

Question 4

What is the most likely reason that nonmetals are electrical insulators?

Revolt · Accepted Answer

Since valence shells in nonmetal atoms are almost full, the atoms attract electrons and hold them tightly to fill their valence shells.

Question 5

Which describes any substance that shatters or breaks easily?

Revolt · Accepted Answer

brittle

Question 6

Eriq, a chemist, is running tests with four unknown elements. He has found that they all bond the same way, so he knows that they are in the same group on the periodic table of elements. The table shows other properties that Eriq observed.

Revolt · Accepted Answer

17.

Question 7

Krypton is named after the Greek word that means “secret.” Which explains why krypton was most likely given this name?

Revolt · Accepted Answer

Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret.

Question 8

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

Revolt · Accepted Answer

at the top of group 17

Question 9

When looking across the periodic table from left to right, which of these groups are the first to contain nonmetals?

Revolt · Accepted Answer

group 14

Question 10

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

Revolt · Accepted Answer

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

Periodic Trends Answers

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