Pls help!! I need the extra credit 1. Atoms form an ion when the amount of which particle charges
2. Which groups tend to form cations?
3. How many total electrons does potassium have when it becomes an ion with its preferred oxidation number?
4. What happens to an atom as it forms an anion?
5. Most atoms form ions to reach stability. What group on the periodic table (name or number) is already stable as neutral atoms? What makes that group already stable?
6. Why do elements in group 15 prefer to form ions with a -3 oxidation number, instead of a +5 oxidation number?

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

your answer is c) plasma

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