Which element will be unreactive? Why?

Sulfur
Fluorine
Sodium
Neon

Answer 1

Neon

Neon has the electron configuration of

# 1s^2 2s^2 2p^6#

this configuration has great stability because the electron orbital shells and subshells are completely filled. This means that the atom has no more room for more electron density and therefore will not form bonds in order to share electron density with other atoms. Neither will Neon have any pressure to lose electron density by sharing with other atoms.

Sulfur has the same outer electron configuration as Oxygen. Sulfur has two unpaired p electrons that are used for bonding with other atoms. Very unstable think of burning brimstone that is sulfur.

Fluorine has the highest electronegativity of any element. This means that Fluorine has a great pull for the electron density of other atoms, which makes Fluorine the most reactive of all nonmetals.

Sodium has the electron configuration of # 1s^2 2s^2 2p^6 3s^1 3p^0# this configuration leaves sodium with only 1 electron in the outer most shell. Sharing ( or losing) the electron density of this lone electron would give Sodium the same stable electron configuration as Neon. Sodium is extremely reactive quickly giving up the lone outside electron. ( Sodium metal exposed to air will react with the water in the air to release Hydrogen gas and explode. )
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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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