Topic A
A proton has what kind of charge?
Positive
A electron has what kind of charge?
Negative
A neutron has what kind of charge?
Neutral
How many subatomic particles are there?
3
Where are protons located in an atom?
In the nucleus
Where are electrons located in an atom?
Outside of the nucleus
What are the three subatomic particles?
Protons, electrons, and neutrons
Where are neutrons located in the nucleus of an atom?
In the center of the nucleus
Isotopes of an element have the same atomic number but different
mass number
Electrons come from the Greek work meaning
Amber
The atomic number equals the number of
Protons
The mass number is the number of
Protons and neutrons
Who discovered neutrons?
James Chadwick
Who discovered protons?
Ernest Rutherford
Who discovered electrons?
J.J Thomson