The atomic mass of beryllium (be) is 9.01 amu. the atomic mass of calcium (ca), which is in the same group as beryllium, is 40.08 amu. based only on this information, what would you predict to be the atomic mass of magnesium (mg), which is also in the same group but is between be and ca?

It would have a value between 9.01 amu and 40.08 amu.

Explanation:

Hello,

In this case, considering that magnesium is located between beryllium and calcium, its atomic mass will be between 9.01 amu amdn 40.08 amu based on the nowadays organization of the periodic table based on the atomic sizes as well. In such a way, magnesium's atomic mass is about 24.305 amu. This fact is substantiated via the periodic trends associated with the molar mass which states that the higher the period (the atomic radius as well), the higher the molar mass.

Best regards.

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!

if you need further assistance, let me know: )

~ trueboss72

the ratio of the conjugate base to the acid required to attain the desired ph.