Is the compound agbr, iconic or covalent? explain why?

Ionicity and Covalency both are relative terms

Explanation:

So ionicity or covalency of a compound is always checked with respect to another compound.

According to Fajan's rule which tells whether the chemical bond is covalent or iconic, AgBr is more covalent than AgCl because polarizability of Br- ion is greater than Cl- ion. Similarly, covalency of AgF is less than AgBr and ionocity of AgBr is greater than that of AgI compund.

- 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

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.