Atomic Radius

[Maggie Doan 1I]

What is the effect of electrons on the size of the atom?

[Mikka Hoffman 1C]

Atomic radius increases down a group because shells are added with more electrons, so the size of the atom increases. It decreases down a period, though, because the electrons are attracted to the greater number of protons in the nucleus, pulling the electrons in closer.

[AlyssaBei_1F]

Electrons are equal to the number of protons. If an element has more protons, then it will have more electrons, causing the element to have more shells and be bigger.

[Catly Do 2E]

An easy way to memorize how the atomic radius trends are to consider how electrons and protons are attracted to each other.

[Heidi Ibarra Castillo 1D]

so it is based off the attraction of the protons and electrons?