Question

available: oct 1, 2025 8:30am until oct 1, 2025 10:30am
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hester, treyvon
dtal - ch - term 1 - unit 4a assessment - 25 - 26
which of the following is the correct formula unit of calcium phosphide?

Explanation:

Step1: Determine ion charges

Calcium forms $Ca^{2 + }$ and phosphorus forms $P^{3 - }$.

Step2: Use charge - balance

To balance charges, we need 3 calcium ions ($3\times(+ 2)=+6$) and 2 phosphorus ions ($2\times(-3)= - 6$). So formula is $Ca_3P_2$.

Answer:

$Ca_3P_2$