How does the electron configuration of elements within the same group compare? (a.) they all have their valence electrons in the same energy level. ( b) they all have their valence electrons in the same type of subshell. (c) they all have their valence electrons in a p suborbital. ( d) they all have their valence electrons in the 3rd energy level.

B.They all have their valence electrons in the same type of subshell

Explanation:

-be a crystalline solid

- be soluble in water

-conduct electricity

hope this : )

- 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