23456789 Procedures
You fill the 20 containers up with soil 1/2 inch from the top of the pot.
You plant 1 watermelon seed 2" deep in all 20 of the containers.
You label 10 of the pots as sample "A", and 10 pots as sample "B"
You place all the pots in the greenhouse where the temperature is 71 degrees.
You water sample "A" with 2 cups of water at 8:00am, 1:00pm and 8:00pm, every
day.
You water sample "B" with 2 cups of sugar water at 8:00am, 1:00pm and 8:00pm.
every day
What are the variables in this experiment? K

- 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