Flashcards in Elements Compounds & Mixtures Deck (50)
What is an element?
Pure substance that cannot be broken into simplest substances via chemical processes
Elements can be classified into
metal, non metallic properties
Physical state at room temperature
What is an atom?
The smallest particles that has the property of the element
What are noble gases that exist as individual atom called?
What is molecules?
Two or more atom chmeically combined together
What is a polyatomic molecule?
Three or more atom chemically combined together
Give 3 reasons why pure copper is a good choice for making wire?
Good electrical conductivity
What elements has a high melting point 120 degree Celsius and is a non conductor of electricity
What is a compound?
Pure substances that contain 2 or more elements that are chemically bond together
Composition of compound is made up of?
Magnesium + oxygen =
What is the ratio of hydrogen to oxygen in water
hydrogen : oxygen = 2 : 1
What is the ratio of Hydrogen Chloride?
1 : 1
What is the ratio of Carbon Dioxide?
C : O
1 : 2
What is the ratio of Carbon Monoxide?
C : O
1 : 1
What is the ratio of Sulfuric Acid?
H : S : O
2 : 1 : 4
What is the ratio of ethanol?
C : H : O
2 : 6 : 1
Decomposition of compounds can be done via
What is a mixture?
A mixture is made up of 2 or more substances that are not chemically combined
What is the difference between compound and mixture in terms of separation?
Compound - only via chemical
Mixture - physical
What is the difference between compound and mixture in terms of properties?
Compound - different
Mixture -has the properties of substances
What is the difference between compound and mixture in terms of energy/change?
Compound - heat/light given in/out
Mixture - NA
What is the difference between compound and mixture in terms of composition?
Compound - fixed proportion
Mixture - not fixed
What is the appearance of Aluminium?
What is the appearance of Copper?
Reddish brown solid
What is the appearance of Iron?
What is the appearance of Magnesium?
What is the appearance of Mercury?
What is the appearance of Zinc?