I think i used calulater and it gives me 47.5
445/100 - 5/4 = 445/100 - 125/100 = 320/100 = 16/5 = 3 1/5.
1. It’s true
4 ,7 ,8 is correct
It comes from the sun, and then it is converted to energy/electricity (by solar panels)
Answer:
lead with Z = 82 is transformed into Bismuth with Z = 73
The Po with Z = 84 becomes Pb with Z = 82
Explanation:
Beta decay occurs when a neutron emits an electron and an anti neutrino from the atomic nucleus, therefore the atomic number of the material increases by one unit.
Pb + e + ν → Bi
lead with Z = 82 is transformed into Bismuth with Z = 73
In alpha decay, a helium nucleus is emitted from the nucleus of the atom, therefore the atomic number decreases by two units.
Po +α → Pb
The Po with Z = 84 becomes Pb with Z = 82