CHEMISTRY RECAP FROM MIDDLE SCHOOL

FOR YOUR NOTEBOOK:

Lesson 1:  Chemistry Recap From Middle School

Chemistry | Matter

1. Matter - anything that has mass and takes up space

2. Chemistry - the study of the properties of matter and how matter changes.

3. Substance - A single kind of matter that is pure, meaning it always has a specific makeup (or composition) and a specific set of properties.

4. Physical Property - a characteristic of a pure substance that can be observed without changing it into another substance.

5. Chemical Property - a characteristic of a pure substance that describes its ability to change into different substances.

6. KEY CONCEPT- Every form of matter has two kinds of properties, physical properties and chemical properties.

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Atoms | Elements

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1. Element - a pure substance that cannot be broken down into any other substances by chemical or physical means.

2. Atom - the basic particle from which all elements are made.

3. Nucleus - the very small center core of an atom

4. Protons - the positively charged particles in the nucleus (+)

5. Neutrons - the neutrally charged particles in the nucleus. (no charge)

6. Electrons - the particles that move rapidly around the nucleus and have a negative electric charge. (e⁻)

7. Orbitals/Shells - Imaginary guidelines for where the electrons are located.