Which metal is most likely to form more than one kind of positively charged ion? sodium (na) barium (ba) nickel (ni) magnesium (mg)

Answer : The correct option is, Nickel (Ni)

Explanation :

Sodium is the element of s-block with symbol (Na). It belongs to the group 1.

Barium is the element of s-block with symbol (Ba). It belongs to the group 2.

Magnesium is the element of s-block with symbol (Mg). It belongs to the group 2.

Nickel is the element of d-block with symbol (Ni). It belongs to the group 10.

As we know that the d-block elements are the transition element which as ability to shows variable oxidation state.

Hence, the metal most likely to form more than one kind of positively charged ion is, Nickel (Ni)

the millers tale is the answer.

- 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