The first trend of importance is the atomic radius. It is critical to understand
ID: 535740 • Letter: T
Question
The first trend of importance is the atomic radius. It is critical to understand this trend because it is responsible for explaining many of the other trends. The atomic radius is the___of the electron cloud. As one moves down the family, the atomic radius ____. The reason for this trend is each new period added is representative of a new____and each new level adds to the ____of the electron cloud therefore making it___. In addition to a new____there is now an increased number of_____electrons which___absorb the pull of the____thus____the outer electrons from the nuclear pull. This is known as the______. As one moves left to right across a period. the______decreases. As one moves left to right across a series, the energy level_____so_____remains the same, but the number of____and ____is increasing. Protons are much_____than electrons and have the ability to____the electrons towards the nucleus. As the number of protons______ the____increases and the volume___.Explanation / Answer
In addition to a new level, there is now an increased number of innercore electrons which absorbs the pull of the nucleus thus prevents the outer electrons from the nuclear pull. This is known as shielding effect.
As we move from left to right, energy level remains the same, so number of innercore electrons or principal quantum number remains the same, but the number of protons and valence electrons is increasing. Protons are heavier than electrons and have the ability to pull electrons towards the nucleus. So as the number of proton increases, the nuclear pull increases (force of attraction) the volume decreases .
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