Which of the Following Elements Has Only 12 Protons

Q63: When an atom gains an electron,the resulting

Q64: Group 2A elements are called alkali metals.

Q65: The atomic number of nitrogen is 14.01.

Q66: What is the charge on the ion

Q67: A cation forms when an atom gains

Q69: The nucleus of an atom consists mainly

Q70: The relative amount of each different isotope

Q71: Protons and neutrons have similar masses and

Q72: Nonmetals are located where on the periodic

Q73: Group 2A elements are also called:<br>A)noble gases.<br>B)halogens.<br>C)alkaline