How many grams of sodium metal are needed to make 29.3 grams of sodium chloride? Given the reaction: 2 Na + Cl2 2 NaCl

[Atomic masses: Na = 22.99 amu, Cl = 35.45 amu]

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.