Share 8th Sci Unit 7 - Atoms and Elements
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How many elements are there on the Periodic Table?
118 elements
How many periods are there on the Periodic Table?
7 periods
How many groups are there on the Periodic Table?
18 groups
What's the difference between an atom and a molecule?
An atom is just one. A molecule is made up of at least 2 atoms.
Name 6 elements.
Gold, oxygen, silver, copper, hydrogen, carbon
What are all substances made up of?
Atoms - incredibly small particles
What is an element?
A substance made up of only one type of atom.
Is water an element? Why or why not?
No, it is made up of 2 elements - oxygen and hydrogen.
What are the symbols for these elements - oxygen, silicon, aluminium, iron, calcium?
O, Si, Al, Fe, Ca
How many letters are in each element symbol on the Periodic Table?
Either 1 or 2 letters
What do the different colors mean?
Metals, metalloids, and non-metals
What does the purple and white mean on this Periodic Table?
White = naturally-occurring and purple = man-made
Name two ways an element can be different from another element.
Different mass, number of protons, state of matter, hardness, etc.
What is the name of the chart that shows all known elements?
The Periodic Table of the Elements
How is the Periodic Table arranged?
From lowest mass to largest mass
Which element has the smallest mass?
Hydrogen
