4.1.1 - The Structure of an Atom Flashcards
1
Q
Where is mass concentrated in an atom?
A
The Nucleus
2
Q
What particles are inside of an atom’s nucleus?
A
Protons (+1), and Neutrons (0).
3
Q
What is the radius of an atom and its nucleus?
A
Atom - 1 x 10⁻¹⁰m
Nucleus - 1 x 10⁻¹⁴m
4
Q
True or False: The rest of the atom is mostly empty space.
A
True - but tiny electrons orbit the nucleus in shells/energy levels.
5
Q
How does an electron move to a higher energy level?
A
The electron gains energy by absorbing electromagnetic radiation.
6
Q
How does an electron move to a lower energy level?
A
They lose energy by emitting electromagnetic radiation.
7
Q
What happens if one or more outer shell electrons leave an atom?
A
The atom becomes a positively charged ion.
