elements, compounds, and mixtures...elements, compounds, and mixtures mrs. allen bell ringer #3...

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Elements, Compounds, and Mixtures

Mrs. Allen

Bell Ringer #3 8/8/18

What do gold, copper, and aluminum all

have in common?

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Matter is

Anything that has MASS and

takes up SPACE (VOLUME)

Atoms are the smallest particle of

matter.

So how do we get all the

different types of matter that

we see around us?

Atoms group together to make up

everything around us.

They are like bricks in a building.

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There are only 118 Different types of

atoms. They are called Elements.

All matter is separated into 2 types:

Matter

Pure Substances

Elements Compounds

Mixtures

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Pure Substances sample of matter that has definite

chemical and physical properties.

1. Elements sample of matter that is made up of only the

SAME type of atoms

A pure substance that cannot be separated

into simpler substance by physical or

chemical means

found on the

periodic table

(a list of every known

atom)

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2. Compounds

Compounds = pure substances

made up of 2 or more elements

that are chemically combined.

Made of elements in a specific

ratio that is always the same

Has a chemical formula

Can only be separated by

chemical means, not physically

- Elements combine by chemical reactions or

chemical changes

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Molecule

- Molecule = a particle of a compound

oEx. A molecule of water = H2O = 2 Hydrogen

atoms and 1 Oxygen atom

oA lot of H2O molecules = water

Properties of Compounds

o Just like elements, each compound has unique physical

and chemical properties

o Physical properties to identify compounds = melting

point, density, and color

o Properties of a compound can be different than the

properties of individual elements that make it up

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Example: Table Salt

NaCl = Sodium (Na) reacts violently with

water, chlorine (Cl) is a poisonous gas, but

together they are a harmless every day

substance you can eat; also dissolves in

water (without exploding)

Breaking Down Compounds

oCompounds can be broken down into

elements or simpler compounds

oCan only happen by chemical changes like

adding heat or electric current

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Mixtures A combination of two or more pure substances that

are not chemically combined (no bonding).

Substances held together by physical forces, not

chemical (mechanically put together)

No chemical change takes place (NO bonding)

Each item retains its properties while in the

mixture.

They can be physically separated

Chem4kids.com

Work Session: Element, Compound, or

Mixture?

For each item, decide if it is an element,

compound, or mixture and hold up the

number of fingers as follows:

Element = 1

Compound = 2

Mixture = 3

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Element, Compound, or Mixture?

Rocks

Element, Compound, or Mixture?

Rocks

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Element, Compound, or Mixture?

Copper

Element, Compound, or Mixture?

Copper

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Element, Compound, or Mixture?

Jelly Beans

Element, Compound, or Mixture?

Jelly Beans

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Element, Compound, or Mixture?

Table Sugar

Element, Compound, or Mixture?

Table Sugar

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Element, Compound, or Mixture?

Diamond

Element, Compound, or Mixture?

Diamond

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Element, Compound, or Mixture?

Tea

Element, Compound, or Mixture?

Tea

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Element, Compound, or Mixture?

Salt

Element, Compound, or Mixture?

Salt

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Element, Compound, or Mixture?

Neon Gas

Element, Compound, or Mixture?

Neon Gas

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Element, Compound, or Mixture?

Salad

Element, Compound, or Mixture?

Salad

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Element, Compound, or Mixture?

Pure Water

Element, Compound, or Mixture?

Pure Water

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Element, Compound, or Mixture?

Aluminum

Element, Compound, or Mixture?

Aluminum

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Element, Compound, or Mixture?

Lemonade

Element, Compound, or Mixture?

Lemonade

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Element, Compound, or Mixture?

Silver

Element, Compound, or Mixture?

Silver

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Element, Compound, or Mixture?

Sand

Element, Compound, or Mixture?

Sand

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Closing: BrainPOP Compounds and

Mixtures

https://www.brainpop.com/science/matterand

chemistry/compoundsandmixtures/