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- 1. Multiple Choice
J.J. Thomson provided evidence that an atom...is the smallest particle of mattercontains negatively charged particleshas an overall negative chargehas an overall positive charge - 2. Multiple ChoiceRutherford discovered the...electronprotonneutronnucleus
- 3. Multiple ChoiceIsotopes are elements with a different amount ofprotonsneutronselectronsatoms
- 4. Multiple Choicean element will always have the same number ofneutronsprotonsisotopesatoms
- 5. Multiple ChoiceWhich particle does not contribute mass to the atom?ProtonNeutronElectronNucleus
- 6. Multiple ChoiceWhat scientist is best known for his gold foil experiment?J.J. TomsonErnest RutherfordJohn DaltonDemocritus
- 7. Multiple ChoiceAn atom has 10 protons and a mass of 18. It has __ neutrons1018288
- 8. Multiple ChoiceAn ______________ is the same element, with the same number of protons, but different numbers of neutronsAtomIsotopeAtomic NumberMass Number
- 9. Multiple ChoiceThe smallest particle into which an element can be divided and still be the same substanceneutronatomelectron
- 10. Multiple ChoiceThe mass number of an element that has18 protons, 18 electrons, and 19 neutrons is _____.12.5132537
- 11. Multiple ChoiceHow many neutrons does uranium-239 have92147239331
- 12. Multiple ChoiceHow many neutrons will an atom have it has an atomic number of 26, an atomic mass of 58 and a charge of +3?2658323
- 13. Multiple ChoiceHow many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?3436240
- 14. Multiple ChoiceHow many protons are in an atom with an atomic number of 20, an atomic mass of 45, and a charge of +2?2010218
- 15. Multiple ChoiceWhat charge does an atom have if it GAINS an electrons?Positive (+)Negative (-)
- 16. Multiple Choice
Which Greek Philosopher believed that matter is composed of tiny particles called atoms?
Democritus
Aristotle
Phytagoras
Plato
- 17. Multiple ChoiceRutherford's gold foil experiment provided evidence that...negative and positive charges are spread evenly throughout the atom.alpha particles have a positive charge.gold is not a dense as previously thought.there is a dense positively charged nucleus at the center of an atom.
- 18. Multiple ChoiceTrue or False: The majority of an atom is made up of empty spaceTrueFalse
- 19. Multiple ChoiceWhat does the nucleus of an atom contain?Electrons and neutronsProtons and neutronsNeutrinos and positronsDNA and RN
- 20. Multiple ChoiceWhich of the following scientist discovered the current model of the atom?DaltonSchrodinger.ThomsonDalton
- 21. Multiple ChoiceDiscoverer of the neutron?JimmyChadwickCharlestonRutherford
- 22. Multiple Choice
John Dalton wrote postulates to make the idea of the atom useful. Which postulate below was proven wrong?
All elements are made up of tiny indivisible particles called atoms.
The atoms of one element are different from the atoms of another element.
Atoms of different elements chemically combine to form chemical compounds.
During chemical reactions, atoms are rearranged.
- 23. Multiple Choice
What determines the identity of the atom?
protons
neutrons
electrons
isotopes
- 24. Multiple ChoiceCalculate the average atomic mass of silver.106.38649amu111.91896amu107.8677amu121
- 25. Multiple ChoiceAn element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?9.012, Beryllium12.011, Carbon6.941, Lithium10.812, Boron
- 26. Multiple ChoiceIsotopes are atoms of the same element that have the same number of __________ but different number of __________ . Therefore, isotopes of the same element have different masses.protons, neutronsprotons, electronsneutrons, protonselectrons, protons
- 27. Multiple ChoiceA neutral atom of the isotope 2612Mg would consist of12 protons, 26 neutrons, 26 electrons26 protons, 12 neutrons, 26 electrons26 protons, 14 neutrons, 14 electrons12 protons, 14 neutrons, 12 electrons
- 28. Multiple ChoiceA neutral atom would become an ion that has a charge of 2+ byLosing two protonsLosing two neutronsLosing two electrons
- 29. Multiple ChoiceIf neutral copper atom (atomic number 29) becomes an ion that has a charge of 2+, how many electrons does the resulting ion have?27282931
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