Atoms Flashcards
What is in the middle of an atom ?
Nucleus
What makes up the nucleus ?
Protons and Neutrons
What is the charge of an atom and why ?
Positive because of the protons
Where are electrons in the atom ?
Move around the nucleus in electron shells.
What’s the charge of an electron ?
Negative
What is the charge of an electron ?
-1
What is the charge of a proton and the relative mass?
The charge is +1 and the relative mass is 1
What is the relative mass and charge of a neutron?
The relative mass is 1 and the charge is 0
What is the overall charge of an atom ?
Neutral
Why is the atoms charge neutral ?
Because it has the same number of protons as electrons which means they cancel each other out
The number of WHAT equals the number of WHAT ?
Protons = electrons
Where is the atomic number on an element ?
Top
What does the atomic number tell you ?
How many protons there are
Where is the mass number in an element ?
The bottom
What does the mass number tell you ?
Total number of protons and neutrons in the atom
