Question

question 11 (1 point)
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the correct formulas for beryllium sulfide and lithium phosphide are:

1. bes and li₃p
2. bas₂ and li₃(po₄)
3. beso₄ and li(po₄)₃
4. be₂s and lip₃

Explanation:

• Beryllium has a +2 charge (\(Be^{2+}\)) and sulfide has a -2 charge (\(S^{2 -}\)). Using the criss - cross method (charges as sub - scripts and simplifying), the formula for Beryllium Sulfide is \(BeS\).
• Lithium has a +1 charge (\(Li^{+}\)) and phosphide has a -3 charge (\(P^{3 -}\)). Using the criss - cross method, the formula for Lithium Phosphide is \(Li_{3}P\).

Answer:

1. \(BeS\) and \(Li_{3}P\)