What do oxygen (O) and bromine (Br) have in common? They both tend to gain electrons to gain stability. They both have seven valence electrons. They are both halogens. They are both unreactive.

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Oxygen and bromine are both nonmetals, and most nonmetals tend to gain electrons to gain stability

Only bromine has seven valence electrons - oxygen has six.

Only bromine is a halogen (group 7)

They are both highly reactive. Only the noble gases (group 8) are unreactive elements.

Oxygen as well as bromine were indeed nonmetals, and the majority of nonmetals tend to prefer up electrons to become more stable.

What is nonmetals?

Nonmetals include colorless vapors and glossy, high melting point solids; they are chemical elements that often lacking a majority of metallic qualities.

What is electrons?

The electron would be a subatomic particle with a negatively elementary charged electric charge.

Therefore, Oxygen as well as bromine were indeed nonmetals, and the majority of nonmetals tend to prefer up electrons to become more stable.

To know more about electron and nonmetals

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