Atoms General Science 2

CA Standard 3 Elements have distinct (unique) properties and atomic structures. All matter is comprised (made) of one or more of over 100 elements 3a: students know the structure of the atom and know it is composed of protons, neutrons, and electrons

All matter is made of atoms

What is matter? Matter is anything that has ________ and________

Matter is anything that has mass and volume What is matter? Matter is anything that has mass and volume

What are atoms? Atoms are the smallest particles that an element can be divided into each element has its own type of atom

How small are they? There are twenty thousand billion billion atoms in one penny

What are atoms made of? Protons (+) Neutrons ( ) Electrons (-)

What’s in the center of an atom? The nucleus is in the center of atoms Protons (+) and Neutrons are in the nucleus.

Where are the electrons? Electrons (-) travel around the nucleus

Stop and review What are the 3 parts of an atom? Protons Neutrons electrons Protons

What parts are in the nucleus? Protons Neutrons

Which part moves around the nucleus? Electron

- + Charges Protons are positive (+) Electrons are negative (-) Neutrons are neutral (no charge) + -

Bonus question: What charge does the nucleus have? Positive

How do atoms relate to the periodic table?

Each element in the periodic table has a different atom

Name 3 elements that you know Oxygen Gold Silver Calcium Helium Chlorine Hydrogen Nickel Copper

Each element has a different atom Helium Atom Gold Atom

The atomic number is the number of protons. Helium-atomic number 2 2 protons

How many protons does Oxygen have? Atomic number 8 8 protons

In summary All matter is made of

In summary All matter is made of atoms

In summary All matter is made of atoms Atoms have 3 parts:

In summary All matter is made of atoms Atoms have 3 parts: protons, neutrons, and electrons

In summary All matter is made of atoms Atoms have 3 parts: protons, neutrons, and electrons The nucleus of the atom has

In summary All matter is made of atoms Atoms have 3 parts: protons, neutrons, and electrons The nucleus of the atom has the protons and neutrons

In summary All matter is made of atoms Atoms have 3 parts: protons, neutrons, and electrons The nucleus of the atom has the protons and neutrons The periodic table shows

In summary All matter is made of atoms Atoms have 3 parts: protons, neutrons, and electrons The nucleus of the atom has the protons and neutrons The periodic table shows all the different atoms

In summary All matter is made of atoms Atoms have 3 parts: protons, neutrons, and electrons The nucleus of the atom has the protons and neutrons The periodic table shows all the different atoms The atomic number is the number of

In summary All matter is made of atoms Atoms have 3 parts: protons, neutrons, and electrons The nucleus of the atom has the protons and neutrons The periodic table shows all the different atoms The atomic number is the number of protons