Flashcards
Science Exam
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.
- 3whats the atomic number of hydrogen?1
- 4what is an isotope?Isotopes are atoms that have a different number of neutrons in their nuclei.
- 5In 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.
- 6what addition was made to the atom theory in 1897?Sir J.J Thompson proposed that atoms contained electrons.