Maria's group in science was testing to see if adding salt to ice water made the water colder than adding just ice. They set up 2 beakers with water, ice, and a thermometer. They added 5 tablespoons of salt to beaker 1. They then stirred the water in both beakers for 1 minutes and checked the temperature. What would Maria's group need to do to repeat the experiment?

- 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

c. orbital shape i hope this is correct

answerspecific gravity;