Complete the sentences to explain your answer in Part A.
As would be (blank) Si in atomic radius because, as you trace from Si to As on the periodic table, you move (blank) the column and then to the (blank) across the period, and these two movements result in (blank) the atomic radius.
Ga would be (blank) Si in atomic radius because, as you trace from Si to Ga on the periodic table, you move (blank) a column and then to the (blank) across the period, which both result in (blank) the atomic radius.
Ge would be (blank) Si in atomic radius because, as you trace from Si to Ge on the periodic table, you move (blank) a column, which results in (blank) the atomic radius.