Chemistry 1
What is an element, and give an example?
What is is called when 2 or more elements are joined together physically and can be reversed.
Mixture
What is the lightest element on the periodic table?
Hydrogen
What is Matter?
Everything
What is a compound and how is it joined?
A compound is made up of 2 or more elements joined together chemically.
What is a homologous mixture?
Mixture that has a uniform distribution? E.g., Black tea and milk mixed together.
Where would I find the atomic number
Top left of the element box
What are the three states of matter?
Solid, Liquid, Gas
What is a mixture?
2 or more elements joined together physically.
Ice melting is an example of what type of reaction? Physical or chemical?
Physical because it can be reversed.
What elements has the symbol Au?
Gold
What is matter made out of?
Particles called atoms.
Can you tell me the amount of atoms of each element in the following. CH4
C x 1
H x 4
A bush fire occurs. Is this physical or chemical change and why?
Chemical because it cannot be reversed.
What is the element with the atomic number 33
Arsenic
What is an example of a solid changing state to a liquid.
Ice melting
Can you give me an example of a compound.
H2O or C2O
What is a heterogeneous mixture?
Has no uniform distribution. E.g., oil and vinegar
Can you name any element apart of the Noble Gases
Helium, Neon, Argon
What is an example of a liquid to gas state of matter change
evaporation