Periodic table of elements an atom contains 11 protons and 12 neutrons, its atomic number will be_ and the mass number will be _. a 1, 23
b 11, 23
c 12, 11
d 23, 11

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves

1) a

2)c

3)a

4)c

5)b

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