False Alkaline earth metals is group 2
I think it’s A but I’m not sure, if it’s wrong I’m sorry
Answer: 2948
Explanation:
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
Expression for rate law for first order kinetics is given by:
where,
k = rate constant =
t = age of sample = ?
a = let initial amount of the reactant = 100
a - x = amount left after decay process = 
Thus the fossil is 2948 years old.
All the elements in one group have the same number of valence electrons.
Answer:
That we know about yes, but physicians still say there are more things out there. (we do not know about these yet tho)
Explanation: