Changes in the Atomic Model (AQA GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
What did the Ancient Greeks believe about atoms?
What did the Ancient Greeks believe about atoms?
They are tiny spheres that cannot be divided
In which year were electrons discovered?
In which year were electrons discovered?
1897
What did the plum-pudding model suggest?
What did the plum-pudding model suggest?
A ball of positive charge with electrons in it
What material was used as the foil in the alpha-scattering experiment?
What material was used as the foil in the alpha-scattering experiment?
Gold
What charge do alpha particles have?
What charge do alpha particles have?
Positive
What was the main observation in the alpha-scattering experiment?
What was the main observation in the alpha-scattering experiment?
Most alpha particles passed straight through
What did the observation of most alpha particles passing through show?
What did the observation of most alpha particles passing through show?
Atoms are mainly empty space
Why were some alpha particles deflected in the experiment?
Why were some alpha particles deflected in the experiment?
Centre of atom has a positive charge
What did alpha particles bouncing straight back reveal about the atom?
What did alpha particles bouncing straight back reveal about the atom?
Centre contains a great deal of mass
What did Niels Bohr propose about electrons?
What did Niels Bohr propose about electrons?
They orbit at specific distances
Who discovered neutrons?
Who discovered neutrons?
James Chadwick
What is the radius of an atom?
What is the radius of an atom?
m
Why do atoms have no overall charge?
Why do atoms have no overall charge?
Number of electrons equals number of protons