Answer:
D. 2,1,1,1
Explanation:
2NaI + PbSO4 → PbI2 + Na2SO4
Elements combine<span> to </span>form<span> chemical </span>compounds<span> that are often divided into two categories. Metals often react with nonmetals to </span>form<span> ionic </span>compounds<span>. These </span>compounds<span> are composed of positive and negative ions formed by adding or subtracting electrons from neutral atoms and molecules.</span>
They will mostly fill the octet rule rather than the nonmetal counterparts. Especially in the case of hydrogen