What are two elements that would have properties similar to oxygen?

Answer 1

Other elements in the same group would have properties similar to oxygen.

Oxygen is in group 16/VIA, which is called the chalcogens, and members of the same group have similar properties. Sulfur and selenium are the next two elements in the group, and they react with hydrogen gas #("H"_2")# in a manner similar to oxygen.

For example, when reacting with hydrogen gas, these elements form a polar bent molecule containing two atoms of hydrogen, and one atom of the chalcogen (O, S, Se).

Water: #"H"_2"O"#

Hydrogen sulfide: #"H"_2"S"#

Hydrogen selenide: #"H"_2"Se"#

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Answer 2

Jose Ayala

Selenium and sulfur.

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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.