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WorksheetsAtomic structure and separation of mixtures revision
Total questions: 20
Worksheet time: 10mins
The charge of a proton is:
1
0
+1
-1
The mass of an electron is:
0
1
1/2000
-1
Atoms of the same element with different numbers of neutrons are known as:
Molecules
Ions
Isotopes
Compounds
A chlorine atom has 17 electrons. Its electron configuration is:
2, 8, 7
2, 4, 8, 3
2, 7, 8
2, 8, 8
An oxygen atom has 8 electrons. Its electron configuration is:
2, 8, 8
2, 6
2, 8, 6
2, 4, 2
This image can be best described as:
An element
A mixture
A mixture of elements
A mixture of elements and compounds
A mixture of compounds
This image can be best described as:
An element
A mixture
A mixture of elements
A mixture of elements and compounds
A mixture of compounds
Choose the factors that affect the rate of diffusion
Particle shape
Particle size
Temperature
Concentration
State of matter
When dry ice is heated, it changes from a solid to a gas. This is known as:
Evaporation
Boiling
Condensation
Sublimation
Which separation technique can be used to separate a mixture of soluble substances in a solution?
Filtration
Crystallisation
Distillation
Chromatography
Which separation technique can be used to separate an insoluble substance from a solution?
Filtration
Crystallisation
Distillation
Chromatography
Which separation technique can be used to separate liquids based on their boiling point?
Filtration
Crystallisation
Distillation
Chromatography
Which separation technique can be used to obtain a solute from a solution?
Filtration
Crystallisation
Distillation
Chromatography
In chromatography, the baseline should be drawn in pencil because:
Pen ink may dissolve in the solvent and run with the solutes
It is accurate
We always draw with pencil
It is soluble
In chromatography, Rf values are always:
Greater than 0
Less than 1
Between 0 and 1
How many protons does an atom of caesium have?
55
72
78
133
How many electrons does an atom of caesium have?
55
72
78
133
What is the relative mass of caesium?
55
72
78
133
How many neutrons does and atom of caesium have?
55
72
78
133
What is meant by the term 'nucleon number'
The number neutrons
The number of particles in the nucleus (protons and neutrons)
The number of neutrons and electrons
The power of a nuclear explosion
