Which of the following statement is correctA Atomic size decreases down the groupB Atomic size increases across the periodC Anions are smaller than the parent atomD Cations are smaller than the parent atom

Which of the following correctly explains why the sizes of atoms decrease from left to right across a period?AThe number of electrons increases.BThe number of protons increases.CThe principal quantum number increases.DThe distance from the nucleus increase

Which sentence best explains the observed trend in atomic radius as you move down the periodic table?A.The more neutrons a nucleus has, the larger the atomic radius.B.The more core electrons an atom has, the smaller the atomic radius.C.The more energy levels that are occupied by electrons, the larger the atomic radius.D.The more paired electrons there are, the smaller the atomic radius.

What makes the atomic radius change along a period in the periodic table?A.More electrons pair in orbitals, making the atomic radius smaller.B.More electrons in the valence shell make the radius bigger.C.More protons in the nucleus pull the electrons in, making the atomic radius smaller.D.The increased atomic mass makes the atomic radius bigger.

Which is greater in size ?(a) An atom or a cation(b) An atom or an anion(c) Fe2+ or Fe3+

While moving in a period from left to right,Atomic size decreasesNuclear charge increasesI.E increasesAll of the above