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Nonmetals Answers

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

A
Krypton is a halogen, so it is a secret element because it is always part of a compound and is difficult to find by itself.
B
Krypton is a halogen, so it should be kept secret because it is so reactive and toxic.
C
Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret.
D
Krypton is a noble gas, so it secretly bonds with every type of element without showing it.
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Which element is likely to be the most reactive?

A
bromine (Br)
B
chlorine (Cl)
C
fluorine (F)
D
iodine (I)
3

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?

A
The period 2 element would be more reactive because the attractive force of protons is stronger when there are fewer neutrons interfering.
B
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.
C
The period 4 element would be more reactive because the attractive force of protons is stronger when there are more neutrons helping.
D
The period 4 element would be more reactive because the attractive force of protons is stronger when electrons are attracted to a farther electron shell.
4

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

A
at the top of group 17
B
at the bottom of group 17
C
at the top of group 18
D
at the bottom of group 18
5

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

A
group 2
B
group 7
C
group 14
D
group 18
6

Which element has a complete valence electron shell?

A
selenium (Se)
B
oxygen (O)
C
fluorine (F)
D
argon (Ar)
7

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

A
They have many electron shells, so their protons do not attract electrons strongly.
B
They have eight electrons in their valence shells, so they are stable without gaining or losing electrons.
C
Their valence shells are empty, so they do not need to bond with other elements to be more stable.
D
Their valence shells are so close to the protons in the nucleus that bonding cannot happen like in other elements.

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