Atomic radius decreases as you go across a period. Why does this occur?
Atomic radius decreases as you go across a period. Why does this occur? a. The number of protons and electrons increase creating less attraction between the positive nucleus and the negative electron. b. The number of protons and electrons increase creating more attraction between the positive nucleus and negative electron. c. The number of protons and neutrons increase creating MORE mass. or d. The number of protons and neutrons increase creating LESS mass?
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Most of volume of an atom is the electrons. The force that prevents the electrons from moving away from the nucleus is force of attraction between the protons in the nucleus and the electrons. This force increases as the number of protons and electrons increases. As you go across a period, the number of protons and number electrons. As the force increases, the electrons are pulled closer to the nucleus of the atom. This causes the atomic radius to decrease. Answer b is the correct answer.