Happy Friday Scientists
Entry Task Expectations:
In your seat, materials out (sharpened pencil
and all your science journals/notes)
Entry Task: Copy the learning target in your
science journal + be ready to take the safety
test
Week 2/Day 4 Target: I know what an atom
is and can diagram the basic components. I
can demonstrate understanding of safety in
science
Today’s agenda
#1 Learning target preview
#2 Safety Test/Scoring
#3 Atoms & elements
#4 Review targets and homework
Wrap up/review from Monday
1
1. What is an atom?
The building blocks of all matter
Made up of protons, neutrons, and
electrons.
Infinitely small
Mass is determined by how many protons
and neutrons are in the atom’s nucleus
2. What are the four parts of an
atom?
2
Element
A specific kind of atom/matter
Determined by how many
protons are in the nucleus.
3
States of Matter
At room temperature
• -solid (atoms not moving)
• -liquid (atoms slowly moving)
• -gas (atoms freely moving)
4
Key to the Periodic Table
Elements are organized on
the table according to their
atomic number, usually
found near the top of the
square.
The atomic number
refers to how many
protons an atom of that
element has.
For instance, hydrogen
has 1 proton, so it’s
atomic number is 1.
The atomic number is
unique to that element.
No two elements have
the same atomic
number.
Reading an element in the periodic
table
Atomic
Number
(number of
protons in
the
nucleus)
Element
Symbol
Element
Name
1.008 Atomic Mass
1
(neutrons + protons)
H
Hydrogen
gas
State of
matter at
room
temperature
(can be a
color or
label)
5
Atomic Number
This refers to how
many protons an
atom of that
element has.
No two elements,
have the same
number of protons.
Bohr Model of Hydrogen Atom
Wave Model
Atomic Mass
Atomic Mass refers
to the “weight” of
the atom.
It is derived at by
adding the number
of protons with the
number of
neutrons.
This is a helium atom. Its atomic mass is 4
H(protons plus neutrons).
What is its atomic number?
6
7
8