Copper has two naturally occurring isotopes. Copper-63 has a percent abundance of 69.17% and copper-65 has a percent abundance of 30.83%. Based on this information calculate the average atomic mass of copper. *

The answer to your question is 63.62 g/mol

Explanation:

Data

Copper-63    abundance = 69.17 %

Copper-65    abundance = 30.83 %

Average atomic mass = ?

Formula

Average atomic mass = [Atomic mass of Copper-63 x abundance] +

                                       [Atomic mass of Copper-65 x abundance]

-Substitution

Average atomic mass = [63 x 69.17/100] + [65 x 30.83/100]

-Simplification

Average atomic mass = 43.58 + 20.04

-Result

Average atomic mass = 63.62 g/mol

- 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

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.