3. X is a particle with 18 electrons and 20 neutrons. Which of the following particles could be X?
1: Ar >
2: 40Ca2+
3: 39K
A. 1, 2 and 3
B. Only 1 and 2
C. Only 2 and 3
D. Only 1

i believe the answer is a.

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.

brian made this table to organize his notes on changes of state. depostion is a change of state that has the wrong energy change listed. it is utilized to collect data as a portion of the development means and in restricted conditions which may be applied at test.

a deposition in the authority of the united states or research for development in the authority of canada includes the catching of affirmed. the out-of-court verbal assertion of a spectator that may be lessened to a printed record for succeeding application for discovery purposes.