Which trends are observed when the elements in period 3 on the periodic table are considered in order of increasing atomic number?
(1) the atomic radius decreases, and the first ionization energy generally increases.
(2) the atomic radius decreases, and the first ionization energy generally decreases.
(3) the atomic radius increases, and the first ionization energy generally increases.
(4) the atomic radius increases, and the first ionization energy generally decreases.