Element Symbols
Al
What is aluminum
True
Where can I find the atomic number of an element?
At the top of each square.
Atoms are mostly...
empty space
Who had this idea..."Everything is made of small, indivisible particles"
Democritus
Mg
What is magnesium
Convert 22mm into meters.
.022
What does the atomic number tell you?
The number of protons
Smallest division of matter...
an atom
Discovered the electron.
JJ Thompson
Au
What is gold
Protons and neutrons have the same mass.
True
The atomic mass is found here.
The bottom of each element's square.
The ___________ is the sum of protons and neutrons.
atomic mass
Common substances break down into the same elements in the same proportions.
John Dalton
U
What is uranium
Write .00000067 in scientific notation.
6.7 x 10^-7
What specific information can you find using the atomic mass?
The number of neutrons.
What is one way to represent the size of an atom?
HINT: we saw at least 2-3 examples.
atoms the size of blueberries filling the earth, cherries, bill nye's desert setup, etc
Believed in the continuous model of matter which consisted of four elements: earth wind, water, and fire.
Aristotle
Pb
What is lead
Hg
What is mercury
If Europium has an atomic number of 63 and an atomic mass of 151.964, how many neutrons does Europium have?
89
All elements have the same size atoms.
Shot particles at gold foil, thus claiming that an atom as a small, dense, positively charged center.
Ernest Rutherford