1) Arrange the elements of Period 3 according to decreasing electronegativity (P-15, Mg-12, Cl-17, Si-14, Na-11)

A. Na, Mg, Si, P, Cl
B. Cl, P, Si, Mg, Na
C. Cl, Mg, Na, P, Si
D. P, Mg, Cl, Si, Na

2) What element has the electronic configuration of this?

" 1s² 2s² 2p⁶ 3s¹ 3p³ "

A. Aluminum
B. Silicon
C. Phosphorus
D. Sulfur

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