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S3W2 Elements, compounds and molecules

Last updated 3 months ago
11 questions
1

watch this video. do you have any questions?

1

match the vocabulary with their definitions

Draggable itemCorresponding Item
element
an organized chart of all known elements, arranged by their properties and atomic structure
periodic table
the smallest particle of an element that maintains all properties of that element
atomic number
two or more atoms bonded together
molecule
A substance made of one type of molecule, where that molecule is made up of two or more different types of atoms
bond
forces that hold atoms together in molecules
Chemical symbols
a pure substance made up of only one type of atom
atom
the number of protons in an atom's nucleus, which determines what element it is
compound
the one to two letter abbreviation for an element
1

A chemical formula for an molecule will tell you a couple things. To start with - it will tell you have types of atoms are in the molecule. To do this it will use each type of atom's chemical symbol. There will also be a subscript number that will tell you how many of that atom there will be. So H_2O is a chemical formula for water. There are two Hydrogens (H) and one oxygen (no need for a subscript if there is only one). How many atoms total are in the H_2O_2 molecule?

1

Sometimes you will see a number in front of a chemical formula. Like this -

that just tells me you have three of the same kind of molecule. If I have 3Fe_2O_3, how many oxygen atoms do I have total?

Required
6

Sort the following as either an ELEMENT or a COMPOUND

  • Oxygen =O_2
  • Water = H_2O
  • Gold = Au
  • Sugar = C_{12}H_{22}O_{11}
  • ELEMENTS
  • COMPOUNDS
1

If you are not in 8th grade or honors you can be done. If you aree 8th grade or honors, continue here. Watch this video:

1

Which element is a noble gas commonly used in balloons?

1

In the Periodic Table, the vertical columns that extend up and down the Periodic Table are called

5

What makes Noble Gases unique?

8

Draggable itemCorresponding Item
purple oval
element symbol
Green square
element name
blue hexagon
atomic number
red star
mass number
1

What would be something about the organization of the periodic table that you would be comfortable explaining in class?