1.2 - Atomic structure Flashcards
1
Q
Where is the nucleus?
A
At the centre of the atom
2
Q
What does the nucleus contain?
A
Protons and neutrons
3
Q
What is the charge of a proton?
A
+1
4
Q
What is the charge of a neutron?
A
0
5
Q
Where are the electrons in an atom?
A
They move around the nucleus
6
Q
What is the charge of an electron?
A
-1
7
Q
What is the overall charge of an atom and why?
A
- An atom has no overall charge
- because the number of protons is equal to the number of electrons, and their charges are equal and opposite
8
Q
What is the atomic number of an element?
A
The number of protons in an element (also the no. of electrons in an atom)
9
Q
What is the mass number of an element?
A
The total number of particles in the nucleus of an atom (protons + neutrons)
