Transcript atoms

What makes up
all matter in the
universe ?
ATOMS
What are the
three parts of an
atom ?
Protons, Neutrons,
and Electrons
What is the
NUCLEUS of an
atom ?
It is the center of
the atom made up
of Protons and
Neutrons.
What is a
PROTON ?
It is the positively
charged particle in
the center of the
ATOM
What is a
NEUTRON ?
It is the neutrally
charged particle in
the center of the
ATOM
What is an
Electron ?
It is the negatively
charged particle
on the outside of
the ATOM
What is The
Atomic Number
?
The number of
Protons in an
ATOM.
What is equal to
the number of
PROTONS in an
ATOM ?
The number of
Electrons in an
ATOM.
What is The
Atomic Mass ?
The number of
Protons plus the
number of
NEUTRONS in an
ATOM.
Why are Electrons
not included in the
Atomic Number ?
They have almost
no mass.
What is the
BOHR’s model?
A way to
understand the
organization of an
ATOM.
The first ring can
hold = 2 electrons.
The second ring can hold
= 8 electrons
The third ring can hold =
18 electrons
Critical thinking:
If the ATOMIC
number is 3, then
how many Protons
does the ATOM
have ?
3 PROTONS
Critical thinking:
If the ATOMIC
number is 3, then
how many
Electrons does the
ATOM have ?
3 Electrons
On your own paper, create
an Atom model with an
Atomic Weight of 5
On your own paper, create
an Atom model with an
Atomic Weight of 5
Homework Due
Tuesday:
Page 130 #1.a.b.c..
(complete sentences).
Wednesday’s In class work:
You will get 2’’x2’’ papers.
On one side you will draw the bohr’s
model of four atoms.
On the other side you will copy the
information from the periodic table