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WorksheetsESP_Chemistry 1
Total questions: 10
Worksheet time: 6mins
An aluminium atom has a nucleon number of 27 and a proton number of 13. How many neutrons does this aluminium atom contain?
13
14
27
40
Which statement about atoms is correct?
Atoms contain protons and electrons in the nucleus.
Neutrons are negatively charged.
Protons are positively charged.
The nucleon number is the number of neutrons.
What do the nuclei of H 1 1 hydrogen atoms contain?
electrons and neutrons
electrons and protons
neutrons only
protons only
The table shows the nucleon number and the number of neutrons in one atom of isotopes W, X, Y and Z.
Which statement about W, X, Y and Z is correct?
W and X are isotopes of the same element.
X and Y are isotopes of elements in the same group of the Periodic Table.
Y and Z are isotopes of elements in the same period of the Periodic Table.
Z has a higher proton number than Y.
Atoms contain electrons, neutrons and protons. What is the definition of nucleon number?
the number of neutrons in the nucleus of an atom
the number of protons in the nucleus of an atom
the total number of neutrons and protons in the nucleus of an atom
the total number of particles in an atom
Which change of state takes place during evaporation?
gas to liquid
liquid to gas
liquid to solid
solid to gas
In which process do particles move closer together but remain in motion?
condensation
diffusion
evaporation
freezing
A sugar cube is dropped into a hot cup of tea. The tea is not stirred. Which statement explains why the tea becomes sweet?
The heated water molecules penetrate the sugar cube.
The hot tea causes the sugar to melt.
The sugar cube dissolves and its molecules diffuse.
The sugar molecules get hot and evaporate.
A few drops of perfume were spilt on the floor. A few minutes later the perfume could be smelt a few metres away. Which two processes had taken place?
distillation and condensation
distillation and diffusion
evaporation and condensation
evaporation and diffusion
‘Particles moving very slowly from an area of high concentration to an area of low concentration.’ Which process is being described above?
a liquid being frozen
a solid melting
a substance diffusing through a liquid
a substance diffusing through the air
