1. Day 1 – The Atom
Sci 10
Chemistry

2. Definitions Chemistry: study of the structure and properties of matter
Element: a substance with only one single type of atoms *found in The Periodic Table of Elements
Atom: the smallest part of an element
can exist on its own or in combination with other atoms

3. The atom is made up of 3 types of particles:
protons:
Positive charge (+1)
In the nucleus (centre) of the atom
neutrons:
Neutral (no charge) (0)
In the nucleus of the atom
electrons :
Negative charge (-1)
In clouds (shells) that surround the nucleus

4. Group Activity
Use your periodic table, Google, etc. to find the # of protons, electrons and neutrons for the atoms below.
Model them with the playdoh provided. C Be H N Ne
Complete the table and answer questions a,b,c. *You’re looking for patterns here.

5. Video – The Atom

6. An atom's mass
The nucleus is the part with the greatest mass because protons and neutrons have larger masses than the mass of electrons

7. The Periodic Table - introduction
The periodic table contains elements and information on them

8. The Periodic Table - introduction
The element’s symbol is O
The name of the element : oxygen
The atomic number (the number of protons) : 8
The atomic mass (the average mass of an atom of this element) :
Rounding this number to the nearest whole number gives us the number of protons + neutrons : rounded = 16
# of neutrons =
atomic mass (rounded) – # of protons (atomic number)
= 16 – 8 = 8 neutrons
The number of electrons = the number of protons (atomic number) when the atom is neutral (not charged). Oxygen has 8 protons so it also has 8 electrons.

9. To Do Sign Lab Safety Contract and return
Complete Day 1 The Atom Practice Questions
Journal #1 –
“The hardest thing I learned today was…..”