How many total electrons are in the Pb^4+ ion?
A. 82
B.86
C.78

Explanation:

Lead (Pb) has 82 protons, or positively charged particles. If this was a neutral atom of lead, then there would also be 82 electrons, or negatively charge particles to balance each other out and create an overall charge of 0.

However, we are given an ion of lead (Pb⁴⁺) which means the electrons and protons are not equal.

This is a 4+ ion. Since it is more positive, there must be fewer electrons than protons. In this case, it is 4 fewer electrons.

There must be 78 electrons.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

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