What are the three major categories used to classify elements? a Solids, liquids, gases
b Protons, neutrons, electrons
c Groups, periods, states
d Metals. non-metals, metalloids

i think option no. " D " = " metals, non-metals, metalloids " is the correct answer.

hope this answer will help u.

have a great time

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.

i do not get it   at all