I looked up the half life for nickel-63 and then used the half life formula which is No=Nt*e^(kt) so the final answer is 20000 years for 26g of nickel-63 to decay to 6.5g
Answer:
3) The salivary glands present in the mouth produces saliva
Homogeneous because it completely dissolved so its now one. Heterogeneous would be when they don't dissolve and you see 2 separate substances like sand in water.
2) amine is the correct answer
Able to be hammered or pressed permanently out of shape without breaking or cracking. An example would be hot metal being shaped.