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WorksheetsLEV KS3 Y7 Elements, compounds and mixtures
Total questions: 15
Worksheet time: 8mins
Elements consist of only one type of what?
compound
atom
mixture
symbol
The symbol for carbon is?
Cu
Cr
C
Ca
The columns of the periodic table are called what?
periods
lines
rows
groups
Elements in the same group have similar...
atomic number
appearance
number of protons
properties
When two or more different elements join together with a chemical bond, they are called ....
atoms
mixtures
elements
compounds
When different elements or compounds are combined but aren't joined with a chemical bond, they are called....
mixtures
products
molecules
atoms
A chemical reaction involves two or more chemicals (called reactants) combining together to form one or more new substance called what?
particles
compounds
products
mixture
The elements sodium and chlorine react together to produce what compound?
Sodium chlorine
chloride sodium
sodium chloride
chlorine sodium
The compound copper sulfate (CuSO4) contains how many of each element?
Cu = 0 S = 0 O = 4
Cu = 1 S = 1 O = 1
Cu = 4 S = 4 O = 4
Cu = 1 S = 1 O = 4
calcium carbonate (CaCO3) contains which elements?
Calcium
carbon
oxygen
all of the above
Distillation can used to separate out a mixture of a liquid and a dissolved solid (solution), for example getting pure water from sea water. It involves....
evaporation followed by condensation
condensation followed by evaporation
chromatography
filtration followed by condensation
Filtration is used to separate....
a solution from a solute
a solute from a solution
a soluble solid from a solution
an insoluble solid from a solution
As you move down group 7, the elements become ________ reactive.
more
less
As you move down group 1, the elements become ________ reactive.
more
less
Which statement is true?
Compounds are easily separated back into elements
Some mixture can be easily seperated
