Atomic structure Flashcards
1
Q
What sub-atomic particles are inside an atoms nucleus?
A
Protons and neutrons.
2
Q
The number of protons is equal to the number of…
A
electrons.
3
Q
What electrical charge do electrons have?
A
Negative (-1).
4
Q
What is ‘mass number’?
A
Total number of protons and neutrons.
5
Q
The number of protons is called the….
A
atomic number.
6
Q
You can find the number of neutrons by…
A
taking away the atomic number from the mass number.
7
Q
How many electrons can there be in the lowest energy level?
A
Two.
8
Q
If a group of elements are all in group 3, what makes them similar?
A
They all have 3 electrons in their highest energy level.
