ELEMENT COMPOUND -or- MIXTURE?

One Element The Same Element (Gas) (Solid)

A mixture of two elements – this is still 2 separate elements Another element A mixture of two elements – this is still 2 separate elements This one likes to go round in pairs as a gas (molecules)

This is not a mixture, it is a COMPOUND of two different elements This is just a mixture of two elements

Element, Compound or Mixture Element, Compound or Mixture ? Remember if you are seeing only one type of circle it has to be a …..?

Element, Compound or Mixture ?

Element, Compound or Mixture Element, Compound or Mixture ? When two or more atoms come together of the same type of element, it becomes a?

Element, Compound or Mixture ?

Element, Compound or Mixture Element, Compound or Mixture ? All single colors, not mixed with another color so it is?

Element, Compound or Mixture ?

Element, Compound or Mixture Element, Compound or Mixture ? Still just single colors not combine with other elements so it is a?

Element, Compound or Mixture ?

Element, Compound or Mixture. These now become chemically combined Element, Compound or Mixture ? These now become chemically combined. I can take them apart in a lab setting but it is difficult. I am a?

Element, Compound or Mixture ?

Element, Compound or Mixture. Again, I am combined in some way Element, Compound or Mixture ? Again, I am combined in some way. Can you tell me how many elements are in each group?

Element, Compound or Mixture ?

Element, Compound or Mixture. What is this made up of Element, Compound or Mixture ? What is this made up of? Don’t let this trick you.

A mixture of a compound and an element Element, Compound or Mixture ? A mixture of a compound and an element

What do we call these things? An Atom 3 Atoms

What do we call these things? 6 Atoms which happen to be of 3 different elements

What do we call these things? A Molecule Yes, it also happens to be 2 atoms joined together but we don’t call it “2 atoms joined together” we say it is one molecule

What do we call these things? A Molecule of a compound 2 molecules of a compound

What about when all the atoms are stuck together like in a solid element?

This is just a load of atoms in a solid element, it is not a big molecule

Finally, just to confuse you even more, science teachers like talking about Particles Particle is just a fancy name for individual things. These individual things could be atoms, molecules, lumps of soil, grains of sand, bits of metal. It doesn’t matter because particle is just a general word which is used when we don’t (or can’t) want to be exact about the type of things being described.

A good example of when science teachers use the word particle is when talking about air. Air is a mixture of elements such as oxygen, argon and nitrogen mixed with compounds such as carbon dioxide

Some of the elements in air go around as single atoms (such as argon). Or as molecules such as oxygen. Compounds go around as molecules.

That’s why we talk about particles because it saves the bother of describing exactly what sort of things they are.

ELEMENT A substance that cannot be broken down into other substances by chemical or physical means. Example: Gold Sodium Carbon Potassium

COMPOUND A substance made of 2 or more elements chemically combined. A compound has properties different from the elements it is made of. Example: Water H2O Salt NaCl Sugar C6H12O22

MIXTURE Two or more substances that are mixed together but NOT chemically combined. They can be separated by chemical or physical means. EXAMPLE: Salt water Chex mix Salad