One serving of peanut butter contains 5.0 g of carbohydrate, 12 g of fat, and 6.0 g of wprotein. How many kilocalories (kcal) does a serving of peanut butter contain?
(Round the final answer to the
tens place.)

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )