Atoms

MacArthur MS Curriculum 2013-2014

http://www.dilleyisd.net/apps/pages/index.jsp?uREC_ID=327456&type=u&pREC_ID=426200

EPISD Standards Based Curriculum 2012-2013

Warm Up

• In your Interactive Student Notebook draw an atom and label it’s parts.

• You have 1 minute think time• You have 2 minutes draw time• How did you do? Watch the video and

compare it to your drawing. http://youtu.be/hhbqIJZ8wCM

Matter

The term matter describes all of the physical substances around us

Matter is anything that has mass and takes up space

The Universe is made up of matter and energy

*Matter is made up of atoms.

*An atom is the smallest whole particle of matter.

* The atom is made of three smaller Sub-Atomic particles: Protons, Neutrons, and Electrons.

Early Models of the Atom “Bohr Model”

• Electrons move in definite orbits around the nucleus

Modern Model of the Atom:“The Electron Cloud”

• Spherical cloud of varying density where an electron is more or less likely to be

Atomic Structure

• Nucleus contains:

• Electron Cloud contains:

-Neutrons-Protons

-Electrons

Graphic Organizer

Sub-atomic Particle

• Protons = p+

• Located in the nucleus of the atom • Have a positive charge (+)• Mass = 1 amu

• Neutrons = n0

• Located in the nucleus of the atom • Are Neutral (Have no charge) • Mass = 1 amu

Sub-atomic Particle

• Electrons = e- • Located in the electron cloud around the

outside of the nucleus• Have a negative charge (-)• Mass = 1/1840 amu• Smallest sub-atomic particle

Sub-atomic Particle

EPISD Standards Based Curriculum 2012-2013

Watch this video for review

Atomic Vocabulary Review

Atom- The smallest piece of a substance

Nucleus – The center of an atom

Protons- Subatomic particle found in the

nucleus. It has a positive charge

Neutrons- Subatomic particle

found in the nucleus. It has no charge. Neutral.

Electrons - Subatomic particle found in the an area called Energy levels. This is also known as “The Electron

Cloud.” Negative charge.

The # of protons is the same as the # of electrons.The mass of a proton & neutron is 1 amu. The mass of an electron is almost zero.

Atomic Structure

Who am I?

Who am I?

Who am I?

Describing Atoms

• Atomic Number = number of protons (# p+)– Tell us the identity of the element.– Atomic number is kind of like your student ID number.

# protons+ or # electrons-

• Mass Number = #p+ + #n0

the number of protons + the number of neutrons

• Atomic Mass = mass of protons+ + mass of neutrons0 in the nucleus

Created by G.Baker www.thesciencequeen.net

Periodic Table

8

OOxygen

16

Atomic Number: Number of protonsAlso # of electrons

Element’s Symbol:An abbreviation for the element.

Elements Name

Atomic Mass/Weight:

Weight of protons + neutrons.

EPISD Standards Based Curriculum 2012-2013

Log in to Think Central then click on the videohttps://www-k6.thinkcentral.com/ePC/start.do