Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go...
Transcript of Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go...
![Page 1: Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go around as single atoms (such as argon). Or as molecules such as oxygen. Compounds go](https://reader033.fdocuments.in/reader033/viewer/2022042104/5e828d23e2b62d1df027d33f/html5/thumbnails/1.jpg)
Elements and Compounds
![Page 2: Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go around as single atoms (such as argon). Or as molecules such as oxygen. Compounds go](https://reader033.fdocuments.in/reader033/viewer/2022042104/5e828d23e2b62d1df027d33f/html5/thumbnails/2.jpg)
Warm Up Activity This picture show the atoms that are
present in the air.
1. Which ones are elements?
2. How can you tell?
![Page 3: Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go around as single atoms (such as argon). Or as molecules such as oxygen. Compounds go](https://reader033.fdocuments.in/reader033/viewer/2022042104/5e828d23e2b62d1df027d33f/html5/thumbnails/3.jpg)
What do we call these
things?
An Atom
3 Atoms
![Page 4: Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go around as single atoms (such as argon). Or as molecules such as oxygen. Compounds go](https://reader033.fdocuments.in/reader033/viewer/2022042104/5e828d23e2b62d1df027d33f/html5/thumbnails/4.jpg)
What do we call these
things?
6 Atoms which
happen to be of 3
different elements
![Page 5: Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go around as single atoms (such as argon). Or as molecules such as oxygen. Compounds go](https://reader033.fdocuments.in/reader033/viewer/2022042104/5e828d23e2b62d1df027d33f/html5/thumbnails/5.jpg)
What do we call these
things?
A Molecule
• We don’t call it “2 atoms joined
together” we say it is one molecule.
• Since the atoms are the same, it is
also an element, not a compound.
![Page 6: Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go around as single atoms (such as argon). Or as molecules such as oxygen. Compounds go](https://reader033.fdocuments.in/reader033/viewer/2022042104/5e828d23e2b62d1df027d33f/html5/thumbnails/6.jpg)
What do we call these
things?
A Molecule of a
compound
2 molecules of a
compound
* Notice that these
molecules have
different atoms in
them, so they are
compounds, not
elements.
![Page 7: Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go around as single atoms (such as argon). Or as molecules such as oxygen. Compounds go](https://reader033.fdocuments.in/reader033/viewer/2022042104/5e828d23e2b62d1df027d33f/html5/thumbnails/7.jpg)
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.
![Page 8: Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go around as single atoms (such as argon). Or as molecules such as oxygen. Compounds go](https://reader033.fdocuments.in/reader033/viewer/2022042104/5e828d23e2b62d1df027d33f/html5/thumbnails/8.jpg)
Since there is just one atom, you
would write: Ar
Since there are two atoms of the
same element, you would write O2
Since there are different elements,
you would list both: H2O.
Ar
O H
H
Since there’s 2
oxygen atoms, you
write a “2” after the
O
O
O
If there’s just one
atom, don’t put a
number after it!
![Page 9: Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go around as single atoms (such as argon). Or as molecules such as oxygen. Compounds go](https://reader033.fdocuments.in/reader033/viewer/2022042104/5e828d23e2b62d1df027d33f/html5/thumbnails/9.jpg)
( Gas)
One Element
This one likes to go round
in pairs as a gas.
(molecules)
![Page 10: Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go around as single atoms (such as argon). Or as molecules such as oxygen. Compounds go](https://reader033.fdocuments.in/reader033/viewer/2022042104/5e828d23e2b62d1df027d33f/html5/thumbnails/10.jpg)
This a COMPOUND of
two different elements
Notice there are
two different
types of atoms
joined together.
That’s what
makes this a
compound.
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Element or
Compound?
Element
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Element or
Compound?
Compound
![Page 13: Elements and Compounds - Denton ISD · compounds, not elements. Some of the elements in air go around as single atoms (such as argon). Or as molecules such as oxygen. Compounds go](https://reader033.fdocuments.in/reader033/viewer/2022042104/5e828d23e2b62d1df027d33f/html5/thumbnails/13.jpg)
Element or
Compound?
Compound