Atoms And Ions Flashcards
1
Q
Where are the electrons in an atom
A
Orbiting in shells
2
Q
What is the relative mass of the protons and neutrons
A
1
3
Q
What is the relative mass of electrons?
A
0 (very small)
4
Q
What is the approx radius of an atom?
A
0.01 nm
5
Q
What happens when an atom looses or gains electron?
A
It is positively or negatively charged, so becomes an ion.
6
Q
What number tells you how many protons a element has?
A
The atomic number
