The atomic radius decreases across a period from left to right and increases down a given group. The atoms with the largest atomic radii are located in group l and at the bottom of groups. Moving from left to right across a period, electrons are added one at a time to the outer energy shell. Hope this helps!
Hey there!
1. A chemical reaction is, B).<span> Any time different substances combine to form a new substance, or when a substance breaks up into different substances
2.</span> Balancing chemical equations is called, C). <span>Equivalentry
3.</span><span> Sulfuric acid is made of two hydrogen atoms (H), one sulfur atom (5), and four oxygen atoms (0). What is its formula? C). </span><span>H2S04
Hope this helps!
-Much love, Makayla</span>
The 3d sublevel is not filled until after the 4s sublevel, because the 3d sublevel has more energy than the 4s sublevel, and less energy than the 4p sublevel. (:
