Atoms Flashcards
What is the rough radius of an atom?
0.1 nanometres
Where is the nucleus in an atom?
In the middle
What does a nucleus contain?
It contains protons and neutrons
What is the radius of a nucleus?
1/10 000 of the radius of an atom
What is the charge of a nucleus and why?
It has a positive charge because of the protons
Where does most of the mass of the atom come from?
The nucleus
Where do electrons move?
They move around in the electron shells
What is the charge of a electrom?
They are negatively charged
What does their volume of orbit depend on?
Their volume of orbit depends on the size of then atom
What is the mass of an election?
Virtually nothing
What is the charge of an atom?
Nothing! Ions have got charges though
Why do atoms have no charge?
Because they have the same number of protons and electrons
In an ion why is the overall charge not nothing?
Because the number of protons dosnt equal the number of electrons
What does a nucleus symbol of an atom tell you?
It tells you what the atom is, the atomic number (proton) and the mass number
What does the atomic number tell you?
How many protons there are
