Questions and Answers
Who was the first to adapt Democritus’ theory into the first modern atomic model?
John Dalton
Which scientist modified an earlier theory that matter was made of four elements: earth, fire, water, air?
Aristotle
Which physicist is credited for discovering the electron?
J.J. Thomson
Who was the first person to use the term 'atomos' meaning indivisible?
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According to John Dalton's atomic model, what are atoms of different elements like?
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Which trend describes the change in ionization energy as we move down a group in the periodic table?
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What effect does adding more electrons to a negative ion have on the repulsion force between the electrons?
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How does the effective nuclear charge influence the attraction force between the nucleus and the outer electrons?
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What is the relationship between the effective nuclear charge and the radius of an atom as we move down a group in the periodic table?
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What happens to the amount of energy needed to remove an electron from an atom as we move from top to bottom in a group?
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