Consider this picture… DO NOW Consider this picture… What do you see? What do you think this is a picture of? What is your evidence?

Consider this picture… What do you think it is now? What is your evidence?

Consider this picture… Now do you know what the picture is of? What is your evidence?

Consider this picture… What do you think you are looking at? What do you see? What level are we looking at this picture on – macro, micro, molecular?

Consider this picture… What has changed about what we see? What level is the picture using now – macro, micro, molecular?

The Atom On the molecular level (very zoomed in), we see the molecules. These molecules are called atoms.

Introduction to the Atom

The Atom An atom is the smallest unit of an element that keeps the properties of that element.

How small is an atom? A single penny has 20,000,000,000,000,000,000,000 atoms

Important Information Particle Location Relative Charge Proton Inside nucleus Positive Neutron Neutral “0” Electron Outside nucleus Negative

Inside the atom…

Inside the nucleus of an atom

Inside the nucleus of an atom

Outside the nucleus…

Do you know it?? Label the parts. - 1. 2. + 3. 4. 5.

How do you read the PERIODIC TABLE?

Key Points Atomic # = the number of protons. Atomic mass= # protons + # neutrons. The number of protons and electrons are the SAME. Atomic mass – Atomic # = neutrons.

Check For Understanding Give the mass number of the following elements. Titanium _____ Tin _____ Mercury _____ Oxygen _____ Hydrogen _____

Check For Understanding Give the atomic number of the following elements. Helium _____ Nitrogen _____ Radon _____ Beryllium _____ Sulfur _____

How many Neutrons??

Guided Practice Example: Copper Atomic Mass Atomic Number Protons = Electrons = Neutrons =

Guided Practice

ELEMENT A substance composed of one type of atom. Cannot be broken down further.

COMPOUND A substance composed of two or more different elements are CHEMICALLY bonded together.

MIXTURE Two or more substances that are mixed together but are NOT chemically bonded.

Element, Compound or Mixture?

Element, Compound or Mixture?

Element, Compound or Mixture?

Element, Compound or Mixture?

Element, Compound or Mixture?

Element, Compound or Mixture?

Activity! Play Atom Building Game Or Complete an Atom Structure Worksheet