Atoms Flashcards
1
Q
What is a compound?
A
Formed when atoms join together in a chemical reaction.
2
Q
What is Diffusion?
A
The random mixing and moving of particles in liquids
3
Q
What is an element?
A
Substances that cannot be broken down into anything simpler because they are made up of only one small particle
4
Q
What is a mixture?
A
Contains two or more substances
5
Q
What is a molecule?
A
the building blocks of the substances around us
6
Q
The nucleus
A
- In the middle of the atom
- Contains protons and neutrons
- Positive charge (because of the protons)
7
Q
The electrons
A
- move around the nucleus in shells
- negatively charged
8
Q
Protons are…
A
Heavy and positively charged
9
Q
Neutrons are…
A
heavy and neutral
10
Q
Electrons are…
A
tiny and negatively charged
11
Q
Mass number is
A
the total of protons and neutrons
12
Q
Atomic number is
A
the number off protons
13
Q
Atoms in the same element have the same
A
number of protons
