Atomic numbers for atoms ______________ in increments of _________ as you move across the periodic table of elements.

Question

Please help

 

Answer 1

If you look at an image of the periodic table, you start at the top-left (Hydrogen, atomic number = 1). You go right, then go down when you reach the end of a row. The next is Helium (= 2), then Lithium (= 3) ... so the answer is increase in increments of 1.

 

Remember that atomic number (# of protons) is different from atomic weight (average # of protons & neutrons)