I think the answer is 30 but I’m not sure
1. The mass number is protons + neutrons = mass number. In this case, we have protons + neutron = 164.The atomic number is simply the number of protons so we have 43 + neutrons = 164. Subtracting 43 from both sides we get neutrons = 121.
2. = 4
3. The number of protons in the nucleus does not equal the number of neutrons.
A=mass number:
Z=atomic number (= number of protons)
N=number of neutrons:
A=Z+N
If the number of protons in the nucleus is equal the number of neutrons , we would have an even mass number; because Z=N=x; then A=x+x=2x (this is always an even number) but 23 is an odd number, therefore the number of protons in the nucleus does not equal the number of neutrons.
Answer: C
<span>
The Smith System is one of
the earliest forms of space management that was invented by Harold Smith. <span> He </span>established the Smith
System Driver Improvement Institute to help prevent collisions caused by bad
driving habits. The earliest strategies of Smith system includes the following:
aim high in steering, keep your eyes moving, get the big picture, make sure
others see you and leave yourself an out where you can escape
from your current path of travel when potential mistakes on the road happen.</span>
