It’s the 3d one
Good luckkkkkkkk
Answer:
The number is mostly related to the mass or the weight of the element.
Explanation:
I would agree with the second one, not the first. You can't always see the chemical reaction, and it isn't always sudden. But the second claim is true.
Answer:
Which scientist developed the first model of the atom that showed the structure of the inside of an atom
Ernest Rutherford
