I think it might be B, and A
I will just tell me what you need
<span>Chlorine has 17 electrons in it natural state but it gains an electron and becomes an anion with 18 electrons. </span>
Potassium (K) has 19 electrons in its natural state. It loses an electron and becomes K+ and then is left with 18 <span>electrons .
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The atomic number of calcium is 20 i.e. Ca has 20 electrons.It Loses 2 electrons and becomes Ca++ and has 18 electrons.
<span>The best and most correct answer among the choices provided by the question is the first choice. The characteristic that is primarily responsible for the existence of the rock ledge is its greater resistance to weathering. I hope my answer has come to your help. God bless and have a nice day ahead!</span>
