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Warm Up Activity. This picture show the atoms that are present in the air. . Which ones are elements? How can you tell?. What do we call these things?. _______________. _____________. What do we call these things?.
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Warm Up Activity • This picture show the atoms that are present in the air. • Which ones are elements? • How can you tell?
What do we call these things? _______________ _____________
What do we call these things? _______________________________________________________________________________________________
What do we call these things? _______________ • We don’t call it “2 atoms joined together” we say it is _____________ • Since the atoms are the same, it is also an __________, not a __________
What do we call these things? * Notice that these molecules have different atoms in them, so they are compounds, not elements. _____________ ______________ ______________________________________
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 A particle is just a fancy name for individual things. These individual things could be ______, _________, lumps of ____, grains of _____, or bits of _______. 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 ________ such as oxygen, argon and nitrogen mixed with __________ such as carbon dioxide, or you can say that air is a mixture of _________.
Some of the elements in air go around as ________ _______(such as argon). Or as ___________ such as oxygen. ____________ go around as molecules.
Since there is just one atom, you would write: _____ Ar If there’s just one atom, don’t put a number after it! O Since there are two atoms of the same element, you would write O2 O Since there’s 2 oxygen atoms, you write a “2” after the O Since there are different elements, you would list both: H2O. H O H
One __________ The Same Element (_____) (__________) Notice that both examples are made up of only one type of atom. That’s why it is an ____________.
Another __________ A _________ of two elements This one likes to go around in pairs as a ___ (molecules) Notice the mixture has more than one type of atom in it.
This a __________ of two different elements This is just a ________ of two elements Notice there are two different types of atoms joined together. That’s what makes this a compound. Notice in a mixture the all the molecules are not the same.
Element, Compound or Mixture ? __________
Element, Compound or Mixture ? _________
Element, Compound or Mixture ? _________ of different elements
Element, Compound or Mixture ? Mixture of different elements
Element, Compound or Mixture ? ____________
Element, Compound or Mixture ? _________
Element, Compound or Mixture ? A _________ of a compound and an element