The atomic number increases moving left to right across a period and subsequently so does the effective nuclear charge. Therefore, moving left to right across a period the nucleus has a greater pull on the outer electrons and the atomic radii decreases.
Answer:
no
Explanation:
Small marble chips reacts faster
Pressure buildup in ur ear
Answer:
there are 18 electrons in the outermost shell of argon atom
I think that the answer could be A. X and Y