Discoverers
Who discovered the electron?
Bohr, Rutherford, Thomson, or Chadwick?
Thomson
What is the center of an atom called?
Nucleus
What kinds of elements are found on the left side of the periodic table?
Metals
What is the symbol for Potassium?
K
Which particle has a positive charge?
Protons
Who discovered the proton/nucleus?
Bohr, Rutherford, Thomson, or Chadwick?
Thomson
Where are protons found in an atom?
The nucleus
What kinds of elements are found on the right side of the periodic table?
Non-metals
Si is the symbol for what element?
Silicon
Which particle has a negative charge?
Electron
Who came up with the planetary model?
Bohr, Rutherford, Thomson, or Chadwick?
Bohr
Where are neutrons found in an atom?
The nucleus
Where do you find metalloids on the periodic table?
Along the staircase (darkened out on the periodic table)
Ar
Which particle has a neutral charge?
Neutrons
Who discovered the neutron?
Bohr, Rutherford, Thomson, or Chadwick?
Chadwick
Where are electrons found in an atom?
Outside the nucleus
What are the columns on the periodic table called?
Groups or Families
U is the symbol for what element?
Uranium
Which two subatomic particles are about the same size? (These two tell us the mass of an atom)
Protons and Neutrons
What is the name of the model that we use today?
Electron Cloud
What is the charge of the nucleus?
Positive (Protons and Neutrons)
What are the rows on the periodic table called?
Periods or Series
If an element has a +2 charge, what does that mean?
(Answer using the words protons and electrons)
There are two more protons than electrons.
If you have 3 more electrons than protons, what is an element's charge?
-3 (Ex. N-3)