Elements, Compound, and Mixtures Flashcards
What is an element?
An element is a substance that consists of only one type of atom and can not be broken down into simpler substances by chemical means
What is an atom?
An atom is the smallest part of an element that can exist
Metal properties
Lustrous
Good conductor of heat
Good conductor of electricity
Ductile
Malleable
High melting point
Sonorous
What does lustrous mean?
Shiny
3 examples of magnetic metals
Iron
Cobalt
Nickel
What does malleable mean?
Can be hammered into shape
What does sonorous mean
Rings when struck
What does ductile mean
Can be drawn out into wires
Non-metal properties
Dull
Poor conductor of heat
Poor conductor of electricity
Low melting point
What is an exception for a dull non-metal
Diamonds 💎
What is a non-metal but does conduct electricity
Graphite
Where are metals found on the periodic table
Found to the left of the stepped line
Where are non-metals found on the periodic table
Are found to the right of the stepped line
What is a compound
A compound is a substance that consists of two or more DIFFERENT elements chemically bonded together
Buring magnesium in air
Grey solid at start
Burns with a bright light
Forms a white Ash
What does magnesium in air make
Magnesium + oxygen —— Magnesiumoxide
What does Magnesiumoxide make
Makes a compound
Buring iron wool in oxygen
Grey solid at start
Burns with orange sparks
Forms a black solid
What is the word equation for iron wool and oxygen
Iron + oxygen —– iron oxide
What does iron oxide make
A compound
Sulfur burning in air
Starts a yellow power
Burns with a blue flame
And a colourless, pungent gas forms
What is the word equation for sulfur and oxygen
Sulfur + oxygen —— sulfur dioxide
What does sulfur dioxide make
A compound
Why is this experiment carried out in a fume cupboard
Sulfur dioxide gas is toxic
What is a molecule
A molecule is two is more atom chemically bonded together.
What is a mixture
A mixture consists of two or more DIFFERENT SUBSTANCES that are not chemically bonded and can be easily separated
Mixtures are separated by physical means
Distillation
Filtration
Evaporation
Separating funnel
Chromatography
What is an alloy
An alloy is a MIXTURE of two or more elements, at least one that is a metal and resulting mixture has metallic properties
What are some examples of a alloy
Brass - copper + zinc
Steal - iron + carbon
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Element
One type of atom
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Compound
2 different elements are chemically bonded together ——molecules
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Element
Only one type of atom -molecules
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Mixture of 2 elements
-atoms
