Atoms
Protons have this charge.
Positive
The atomic number tells you the number of this.
What are protons?
This man coined the term "atomos", meaning indivisible, to describe the smallest unit of matter.
Who is Democritus?
This is the name of an atom of an element that has a different number of neutrons.
What is an isotope?
Electrons have this charge.
Negative
The atomic mass number tells you the number of what?
Protons + Neutrons
This man discovered the electron.
Who is Thomson?
Isotopes have the same number of ________.
Protons
True or false. Mr. Carpenter is made of atoms.
true
Are families on the periodic table horizontal or vertical?
Vertical
This man discovered the nucleus.
Who is Rutherford?
What is the isotope name of 158O?
Oxygen-15
What is the nucleus?
Is the atomic mass number above or below the symbol in a cell on the Periodic Table?
Below
Who is Rutherford?
Write in shorthand
6 protons, 8 neutrons
146 C
This is where the electrons live.
What is the electron cloud?
Who was the first to put together the periodic table?
Mendeleev
(not on this test but on the midterm)
This scientist's work led to the Law of Conservation of Mass.
Who is Dalton?
How many neutrons does Neon-21 have?
11