A. 1-
Explanation:
When an atom of oxygen with an atomic number of 8 forms an ion, the overall charge on it will be -1
When atoms from ions, they either lose or gain electrons in the process.
If an atom loses electrons, they become positively charged.
When they gain electrons, they become negatively charged.
An atom is made up of three fundamental particles;
Protons the positively charged particles
Electrons are negatively charged
Neutrons do not carry any charges.
In a neutral atom, the number of protons and electrons are the same
When an atom gains electrons, the number of electrons in it increases and it becomes negatively charged.
When they lose electrons, the number of protons is more and they become positively charged.
Oxygen atoms prefers to gain electrons in order to have a complete octet. When they gain an electron;
With the atomic number of 8:
Number of proton = 8
Number of electrons = 9
Charge = 8-9 = -1
We can represent this as O¹⁻
Ideally, oxygen prefers to gain two electrons to mimic the structure of the noble gas Neon.
Learn more:
Anions in binary compounds brainly.com/question/11041787
Anions brainly.com/question/4670413
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