The age of the fossil given the present amount of Carbon-14 is given in the equation,
A(t) = A(o)(0.5)^t/h
where A(t) is the current amount, A(o) is the initial amount, t is time and h is the half-life. Substituting the known values to the equation,
A(t) / A(o) = 0.125 = (0.5)^(t/5730)
The value of t from the equation is 17190.
Thus, the age of the fossil is mostly likely to be 17190 years old.
Explanation:
Valence electrons are not related in anyways to nuclear reactions.
They do not take part in nuclear reactions. Only some inner orbital electrons have the tendency of taking part in nuclear reactions.
The valence electrons are the outermost electrons in an atom.
Nuclear reactions takes place in the nucleus of an atom.
Valence electrons are exchanged and shared for chemical reactions to take place in between atoms.
We can conclude that valence electrons have no relevance in nuclear reactions
learn more:
Chemical reactions brainly.com/question/3953793
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To come up with the mass of the atom is you add the protons with the neutrons
so you have
60+89=149
