Atoms and the Periodic Table
Proton charge?
+
Electron charge?
-
Electron mass
0
Neutron mass
1
Proton mass
1
19 K 39.098
19- protons which means 19 electrons K - atomic symbol 39.098 - 39-19=20 neutrons
If you want to change to the charge of an atom you can either: Add a proton: Yes or no Add a neutron: Yes or no Add an electron: yes or no
Add a proton: Yes Add a neutron: No Add an electron: yes
If you want to change a type of element your atom is, you can either Add a proton: Yes or no Add a neutron: Yes or no Add an electron: yes or no
Add a proton: Yes Add a neutron: no Add an electron:no
If you want to change the mass of your atom you can either: Add a proton: Yes or no Add a neutron: Yes or no Add an electron: yes or no
Add a proton: Yes Add a neutron: Yes Add an electron: no
Niels Bohr
Agreed an atom had a nucleus surrounded by electrons
John dalton
All atoms of a certain element are identical. But eh form all other elements.
Neutron charge?
Neutral
Atomic number tells:
Number of protons
What determines the element?
Number of protons
K is an example of
Atomic symbol
JJ Thompson
Atoms are made of smaller particles- negative charge (electrons)
Number of electrons:
Atoms have no charge most of the time, which means that they have the same number of protons as the same number of electrons
What is an atom?
Atoms make up matter
Where is the electron located?
Cloud
Ernest Rutherford
Suggest atoms have a nucleus - made up of smaller parts (protons)
Unstable
Different protons and neutrons
James Chadwick
Discovered nucleus contains uncharged particles (neutrons)
Current atomic theory
Electrons move within area around nucleus called electron cloud
Stable
Even amount of protons and neutrons
What would give you a neutral atom?
Protons and electrons
What would increase the mass of an atom?
Protons and neutrons
Which is located in the nucleus?
Protons and neutrons
Parts of an atom?
Protons, neutrons, electrons
Atomic mass:
The number of protons and neutrons in the nucleus
Democritus
You could end up with a particle that could not be cut