Chapter 11, Problem 106AP

lement X, which has a valence shell configuration of $\text{n}{s}^{\text{2}}\text{n}{p}^{\text{4}}$ , was isolated in a laboratory. Which of the following statements is(are) true concerning element X?

Element X has chemical properties similar to those of the halogens.

Element X has six valence electrons.

When element X is reacted with calcium, the compound formed would most likely have the formula ${\text{Ca}}_{\text{2}}\text{X}$ .

Element X needs to gain two electrons to attain a noble gas electron configuration.

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