Answer:
6.02*10^23
Explanation:
This is the number for one mole. Just like one dozen = 12, one mole = 6.02*10^23.
Fun fact, if you had a mole of pennies you could spend 1 million dollars every second of your life and not have even spent 1% of it by the time you die at 100 years old.
<span>B. the He nucleus C.the He electrons D.the He quarks</span>
The principal ingredient of glass is quartz sand (SiO₂).
Answer:

Explanation:
Half time is period required to desintegrating the half of the initial number of atoms. Then, the total time is:

