Finding the average of a group of numbers is one way to analyze data. Dr. Brown found that 3 seeds kept at 25°C sprouted in 8, 8, and 5 days. To find the average number of
days that it took the seeds to sprout, she added 8, 8, and 5 and divided their sum by 3,
the number of subjects (seeds) in the group.
(8+8+5)
7 days
Dr. Brown also found that 3 seeds kept at 30°C sprouted in 6, 5, and 4 days. What's
the average number of days that it took these seeds to sprout?

- 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