The volume of a piece of topaz (a semiprecious gem) weighing 5.95 g is 1.7 mL. The densities of chloroform, carbon tetrachloride, and dibromomethane are 1.48, 1.59, and 2.50 g/cm3 respectively. On which liquid(s) will topaz float?

- 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

mark him as !

14,16 18 reacts with group

lol idk man i guess u gotta ask bill nye the science guy