Elements, Compounds & Mixtures
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What does the diagram to represent an element look like?
One type of particle.
What is a compound?
Two or more different atoms chemically bonded together.
What does the particle diagram for a compound look like?
Two or three different particles stuck together.
What is the definition of a mixture?
Two or more substances mixed together, they are not chemically combined so can be physically separated.
What does a particle diagram for a mixture look like?
Two particles of different elements that are not stuck together or could be a mixture of two different compounds or an element and a compound.
What is the chemical symbol H?
Hydrogen
What is the chemical symbol for the element iron?
Fe
Which element has the symbol Pb?
Lead
What is the chemical symbol for silver?
Ag
Which element has the chemical symbol K?
Potassium
What is the chemical symbol for phosphorus?
P
What did you observe when iron reacts with sulfur?
The mixture glows and a dark grey solid forms
What is the word equation for the chemical reaction that takes place when iron reacts with sulfur?
iron + sulfur –> iron sulfide
What did you observe when magnesium reacted with oxygen?
A bright white light and a white ash is produced.
What is the word equation for the chemical reaction between magnesium and oxygen?
magnesium + oxygen ⇒ magnesium oxide
What is an Element?
Made up of one type of particle called atoms. Can not be broken down into anything simpler by chemical means.