Grade 9 Science – Unit 3 – Chemistry
Chemical Symbols
Atoms and Elements
More Periodic Table
Physical Properties
1 1 1 1 1
2 2 2 2 2
3 3 3 3 3
4 4 4 4 4
5 5 5 5 5
More Bohr RutherfordDiagrams
The number of atoms in Acetic acid (vinegar)
C2H4O2
The number of atoms in Glucose (sugar)
C6H12O6.
The number of atoms in Calcium phosphate
Ca3(PO4)2
The number of elements in Acetylsalicylic acid (aspirin)
C9H8O4
The number of elements in Calcium carbonate (chalk)
CaCO3
The number of electrons in the OUTER SHELL
The element in this diagram
It is the element with two dots on the first shell closest to
the nucleus, eight dots on the second shell and then three
dots on the outer shell to total 13 electrons
The number of
NEUTRONS in the element Sodium
The charge of the ion when Calcium “gives away” its
electrons from its outer shell
The number of neutrons in Silicon
if its Atomic Mass is 28
The Atomic Number of Boron
The number of electrons in Potassium
(Chemical Symbol is K)
The elements with the maximum of electrons
in their outer orbit
The measure of how easily a liquid flows
It is the resistance to being scratched or
dented.