A compound was found to consist of 30g of element W combined with 7 g 1 point of Z. If the relative atomic mass of Wis 40 and the relative atomic mass of
Z is 14, which of the following is the correct empirical formula for the
compound

- 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

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.