WorksheetsStructure of an Atom
Total questions: 21
Worksheet time: 18mins
The Greek philosopher Democritus called the minute particles that made up matter 'atoms', which means ________.
inflammable
invincible
indivisible
inevitable
In the year _______, an English scientist _____________ described an atom as the smallest particle which exhibits all the properties of an element.
1809; John Dalton
1908; JJ Thompson
1808; John Dalton
None of the above
An atom is electrically neutral but can be made to gain a positive or negative charge.
True
False
Electrons were discovered in 1878 by (a) .
Which British scientist studied William Crookes's experiment with cathode rays?
JR Thompson
JJ Thompson
Democritus
None of the above
An electron is denoted by -1e0 where the 0 represents the ________ and the -1 represents the ________.
electrical charge; mass
mass; electrical charge
None of the above
The mass of an electron is __________.
9·108*10-28g
1·602*10-19g
The mass of a proton is __________.
1·672*10-24g
1·602*10-19g
What was JJ Thompson's model of an atom called?
The plum pudding model
The plum cake model
The dry fruit pudding model
None of the above
The particles with no charge in an atom are ___________.
They have a charge of __________.
neutrons; 1·672*10-24
neutrons; 1·676*10-24
protons; 1·672*10-24
None of the above
When did Lord Rutherford conduct his alpha particle experiment?
1808
1908
2005
1911
None of the above
Most of the atom is filled with __________.
electrons
empty space
the nucleus
protons
All of the above
(a) are the atoms of the same element which have the same atomic number but different mass number.
Name one isotope of Hydrogen.
(a)
Name the scientist who stated that electrons revolve around the nucleus in definite orbits or shells?
(a)
According to John Dalton, atoms can neither be _______ nor _______.
brought to life; killed
created; destroyed
thrown; grabbed
All of the above
None of the above
Name the metal used by Rutherford in the alpha particles scattering experiment.
(a)
Atomic number refers to the number of (a) in an atom.
Mass number refers to the number of (a) in an atom.
___________ cannot have more than two electrons as it has only one shell.
Nitrogen
Sulphur
Helium
Oxygen
Hydrogen
