Question | Answer |
[Pg4] Each atom is made up of three types of subatomic particles: ____________________________. | protons, neutrons and electrons.
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[Pg7] The New Zealand scientist Ernest Rutherford discovered that __________________________________________. | the nucleus only takes up a small fraction of the space inside an atom.
| [Fig 1.1.11] The maximum number of electrons in the first shell is ___, second shell is ____, and third shell is _____. | 2, 8, 18
| [Pg5] The _____ charged electron is attracted to the _______ charged proton in the nucleus. This is called _________ attraction. | negatively, positively, electrostatic
| [Pg9] Ernest Rutherford proposed an atomic model called_________. | the Nuclear model
| [Pg9] Niels Bohr proposed an atomic model called_________. | the Planetary model
| [Pg9] Philipp Lenard proposed an atomic model called_________. | the Dynamide model
| [Pg9] Joseph John Thompson proposed an atomic model called_________. | the Plum Pudding model
| [Pg6] Atoms that have the same number of ____ but different numbers of _____ are referred to as _________. | protons, neutrons, isotopes.
| [Pg5]Scientists refer to the number of _____________ in the nucleus as the atomic number. | protons
| [Pg5] The total number of ___________ and ___________ in the nucleus is the atom's _________ number. | protons, neutrons, mass
| [Pg7] The electrons in an atom are attached to the ____ by the ________ charge of the protons. However, the electrons never ______ into the nucleus. This is because ______________________________________________. | see p7
| [Pg6] The number of ________ surrounding the nucleus of an atom is exactly _____________ __ the number of ____________ in the nucleus. As a result, ___________________________. | see p6
| [Fig 1.1.10] In Rutherford's experiment, a beam of ________________ was fired at ____________. Most went ______________ but a small number were ________________. He concluded that _____________. | see p7
| [Pg6] The atomic number tells us the number of _________, which is the same as the number of ___________________. | electrons, protons |