Which is the best description of the chemical reaction shown here in aqueous solution? ch3ch2cooh (aq) ⇌ ch3ch2coo- (aq) h (aq).

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

b is the correct answer

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atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8