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Atomic Structure

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by

Natosha Daniels

on 22 October 2014

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Transcript of Atomic Structure

N. Folarin 2010
BEETLES
APE MAN

Atomic number = Protons OR electrons

Mass - Atomic number = Neutrons
How to remember this stuff…
Atomic Number- The number of protons and electrons in an element.
Symbol
Element Name
Atomic Weight/Mass- The number of protons and Neutrons in an atom.
Draw this diagram in your journals:
This chart should be filled out!
Draw this chart in your journals!!!!!
An Atom has THREE main parts:
Atomic Structure
Draw a Bohr model of this atom, and label the protons, neutrons and electrons.

How many neutrons are in this element?
Now its your turn…
What is the Atomic Number?
19

What is the Atomic Mass?
39

How many protons?
19

How many electrons?
19

How many neutrons?
20
Try it out…
What is the Atomic Number?

What is the Atomic Mass?

How many protons?

How many neutrons?

How many Electrons?
Try it out…

What is the Atomic Number?

What is the Atomic Mass?

How many protons are in Oxygen?

How many neutrons?

How many Electrons?
Try it out…
Electrons have a NEGATIVE charge

They are located OUTSIDE the nucleus on energy levels/shells

Electrons have almost no weight. 1/1836 the size of a proton.
Electrons are not counted when weighing an atom.
Electron
Positive
Charge
Located
INSIDE the NUCLEUS
Weight of
1 AMU

AMU= Atomic Mass Unit
PROTON
Gold Atoms viewed with an electron microscope
The
smallest
particle into which an element (like gold) can be divided and
still maintain the properties of that element.

The
building blocks
of matter.
What is an Atom?
N. Folarin 2010
Draw and label this diagram in your journals!
Intro to the Periodic Table
Neutrons have a NEUTRAL charge
They are located INSIDE the Nucleus
They weigh 1 AMU (atomic mass unit)
Not this neutron….
Neutron
Lightningbugs or Fireflies are not true bugs or flies. They are actually______________.
Random Trivia!!!!!
Ernest Rutherford
2 years later, Niels Bohr modified this model and said that electrons revolved around the nucleus in circular paths, called orbits and at certain energy levels.
In 1911, Ernest Rutherford proposed that atoms had a dense positively charge nucleus surrounded by electrons.
Niels Bohr
HISTORY OF THE ATOM
(That's not Mr. Peters.)
Atomic Structure
n.folarin
2012

Protons determine the identity of an element!!!
8
16
8
8
8
Full transcript