Answer:
The electron configuration of an element is the arrangement of its electrons in its atomic orbitals. By knowing the electron configuration of an element, we can predict and explain a great deal of its chemistry.
There are 6.022 x 10^23 copper atoms in a mole.
Answer:
600 seconds, or 10 minutes
Explanation:
300m/ 0.5m = 600s
Answer:
A piece of gold foil was hit with alpha particles, which have a positive charge. Most alpha particles went right through. This showed that the gold atoms were mostly empty space. Some particles had their paths bent at large angles. A few even bounced backward. The only way this would happen was if the atom had a small, heavy region of positive charge inside it.
Is that all? That doesn’t help us give the answers