Flashcards
Science Exam_3
Flashcards do conjunto (6)
- 1Whats an Atomic number?The amount of protons in an nucleus.
- 2whats an ion?An atom which has lost or gained an electron.
- 3what is an isotope?Isotopes are atoms that have a different number of neutrons in their nuclei.
- 4In chronological order name the scientist that made a major impact on the Atom TheoryDemocritus, John Dalton, Sir J.J Thompson, Lord Rutherford, Niels Bohr, Sir James Chadwick.
- 5what addition was made to the atom theory in 1897?Sir J.J Thompson proposed that atoms contained electrons.
- 6What contribution to the atom theory did John Dalton make?Proposed all matter was made of atoms and that atoms of the same element were alike.
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- Criado por rashadkhan · 9 ago 2015
- Copiado por rashadkhan · 9 ago 2015
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