Right ground state electron configuration for these ions which play important roles and biochemical process in our bodies. (use a noble gas core abbreviation.)

a)ca^2+ i got [ar] for the answer for a is that right

b) fe^2+

c)cu^2+

d)zn^2+

not clear

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

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since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.