A particle that contains 9 protons, 10 neutrons and 10 electrons is
A. positive ion B. neutral atom of a metal C. neutral atom of a non-metal D. negative ion
Correct Answer: D
Explanation
protons = 9 neutrons = 10 electrons = 10 Electronic configuration = 2, 8 Ground state Electronic configuration=2, 7 It means that the atom has gained an electron thereby making it have a negative ion. When an atom donates an electron, it becomes positively charged. When an atom accepts an electron, it becomes negatively charged