An ion of oxygen has a charge of -2. How many protons and electrons does the ion have? __protons electrons

An ion of potassium has a charge of +1. How many protons and electrons does this ion have? protons electrons

The mineral fluorite is made of fluorine and calcium. Use the periodic table of the elements to determine what charge each of these elements will take in order to form a compound. Charge on flourine_ Charge on Calcium_

An atom has 6 protons, 7 neutrons, and 6 electrons. Fill in the blanks for these atom:
Atomic number__ Atomic mass number_ Charge____

This atom belong to which element The element oxygen will always take a charge (valence) of -2 in naturally occurring rocks and minerals.

The chemical formula for the compound,which makes up the mineral quartz, is SIO2.
What is the valence (charge) of silicon in this compound?

Oxygen has 8 protons and 10 electrons due to the addition of 2 electrons, determined from the ion charge. Likewise an ion of potassium has 19 protons and 18 electrons. Charge on fluorine would be -1 and charge on calcium would be +2. Atomic number is the same as the number of protons, so it would be 6, the mass number is the sum of protons and neutrons which would be 13, and the charge is 0, as it is an atom and not an ion.

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