16-7= 9 you subtract the atomic number from the mass and get the number of neutrons so there ae 7 protons and 9 neutrons
The answer is b, for he is comparing the two rocks to find an age relative to the other
<span>Answer: mycologist []</span>
It was believed that the magnetic field to be generated deep down in the Earth's core. But the truth is the flow of liquid iron generates electric currents, which produces magnetic fields.
But the truth is no one really knows for certain so the only thing we know is that the spin of the earth is the cause of its magnetic field
Hope this helped :)
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