You conduct an experiment to determine how effective a fertilizer is on pepper plants. You give 10 pepper plants no fertilizer each day, 10 pepper plants 1 g fertilizer each day, 10 pepper plants 5 g fertilizer each day, and 10 pepper plants 25 g fertilizer each day. Your friend conducts a similar experiment using the same fertilizer. He gives one pepper plant 1 g fertilizer each day, one tomato plant 5 g fertilizer each day, and one squash plant 25 g fertilizer each day. Explain why your experiment is better than your friend's experiment. Cite three aspects of your experiment that are better than your friend's experiment, and explain why each is better.

- 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