WorksheetsThe Development of Atomic Structure
Total questions: 20
Worksheet time: 9mins
Which statement describes the earliest model of the atom?
An atom is an indivisible hard sphere
An atom has a small, dense nucleus
Electrons are negative particles in an atom
Electrons in an atom have wave-like properties.
Who thought that atoms were tiny, solid spheres with no smaller particles within them. and also predicted that atoms could not be destroyed?
Democritus
Aristotle
Plato
Thomson
The main ideas of Dalton's theory were:
1. All matter is composed of ------------ atoms.
2. All the atoms of a given element are ---------.
(a)
In 1808, John Dalton proposed his atomic theory. Recall which of the following statements is one of the main ideas of Dalton's atomic theory.
Atoms are solid spheres
All matter is composed of indivisible atoms
Atoms are made up of smaller charged particles
Who carried out a cathode ray experimentand discovered Electrons in 1897?
J. J. Thomson
Ernest Rutherford
John Dalton
Chadwick
Who proposed a model of the atom that is now called the plum pudding model?
J J Thomson
Ernest Rutherford
James Chadwick
John Dalton
Who discovered Protons when he carried out a gold foil experiment in 1911?
Ernest Rutherford
James Chadwick
Neil Bohr
Erwin Schrudinger
Name the person who discovered the nucleus.
Ernest Rutherford
James Chadwick
John Dalton
Issac Newton
Rutherford carried out an experiment where he fired a stream of alpha particles at a very thin sheet of gold foil. He found that most of the alpha particles passed straight through the foil, while some were deflected at a small angle and some were deflected directly back.
Specify what this experiment told Rutherford about the structure of the atom.
Atoms are indivisible solid spheres
All atter is made up of atoms
Electrons are scattered through a positive shpere
Atoms have a small, dense and posititvely charged nucleus at the centre.
Name the person who discovered neutrons.
Ernest Rutherford
Antoine Lavoisier
John Dalton
James Chadwick
Which is an electron?
A
B
C
The 'atoma' in Greek means
the smallest
the greatest
indivisible
incredible
What did James Chadwick discovered ?
Neutrons contribute almost half of the mass of an atom
Neutrons are found in the nucleus of an atom
Protons are found in the nucleus of an atom
Nucleus is the centre of the atom
Which of the following is correct?
Ernest Rutherford discovered neutron
John Dalton discovered proton
J.J Thomson discovered electron
Niels Bohr discovered nucleus
