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Unit 3: Matter Page 8
Objectives
Lesson 1: Atoms and Density
If you’ve been following the energy nucleus. They don’t “orbit”
curriculum up to this point and are the nucleus. Next lesson we
looking forward to more great will talk more about how they
energy stuff, stay tuned. move. It’s one of the wacky
Electromagnetic energy is coming things about electrons.
soon. However, before we get 6. Atoms differ from one
there, we need to take a bit of a another by how many
side road. We need to wander into protons, neutrons, and
the world of quantum physics for a electrons they have in them.
bit and take a look at the teeny
and the mysterious world of atoms. 7. Elements are specific kinds of
atoms. Every atom is a type
We’re going to study atoms, their of element.
parts, as well as how they work 8. There are over 112 elements.
together. Are you ready? Ninety of which are found
naturally. Twelve different
Highlights for Atoms: elements are the major
1. All matter is made of atoms. ingredients of over 90% of all
2. An atom is the smallest part matter. Five different
of stable matter. elements are the major
ingredients of all living
3. Atoms rarely hang out alone. things.
They join together in groups
from two to millions of 9. Carbon, Hydrogen, Oxygen,
atoms. Nitrogen, and Calcium are
the five main elements that
4. Atoms are made of three make up all living matter.
basic particles. Neutrons,
protons, and electrons. 10. Most atoms come from
stars and have been around
5. Neutrons and protons are since the beginning of time.
together in the middle of the
atom and make up the 11. Atoms get used, and
nucleus of the atom. reused again and again as
Electrons move around the things change over time.
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