Protons have a positive charge which is indicated by a + sign.
Hence, the answer is C.
Explanation:
Below is an attachment containing the solution.
2.14x 1022 kg
the 22 is a xponet of ten
Answer:
c. 12,500
Explanation:
Original number of atoms = 100,000 atoms
Half- life = 10min
Unknown:
The number of atoms that will remain after 10min = ?
Solution:
The half - life is the time taken for half of a radioactive substance to decay by half.
Time taken Number of atom half life
10min 100000 _
20min 50000 1
30min 25000 2
40min 12500 3
