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Chapter 4 Assessment

Content, Concepts, Math Skills

QuestionAnswer
1. Dalton's theory did NOT include which of the following points? All elements are composed of atoms. All atoms, including atoms from different elements, have the same mass. Compounds contain atoms of more than one element. In a specific compound, atoms of different elements always combine in the same way.
2. What is the maximum number of electrons that can occupy an atomic orbital? 1 2 4 There is no limit.
3. J. J. Thomson's experiments provided the first evidence of atoms. a nucleus. subatomic particles. elements.
4. What is meant when an atom is said to be in its ground state? There is no net charge on the atom. The number of protons equals the number of neutrons. The atom's electrons all have the lowest possible energies. It is the isotope with the least number of neutrons.
5. What did Bohr introduce to atomic theory with his model? existence of a nucleus electron clouds existence of neutrons electrons moving in orbits about the nucleus
6. The subatomic particle(s) found in the nucleus of an atom are protons electrons. protons and neutrons. protons and electrons.
7. Calcium's atomic number is 20. What does that that tell us about a calcium atom? Its mass is 20 g. It has 20 neutrons. It has 20 protons. It has 10 electrons and 10 protons.
1. Dalton's theory did NOT include which of the following points? All elements are composed of atoms. All atoms, including atoms from different elements, have the same mass. Compounds contain atoms of more than one element. In a specific compound, atoms of different elements always combine in the same way.
2. What is the maximum number of electrons that can occupy an atomic orbital? 1 2 4 There is no limit.
3. J. J. Thomson's experiments provided the first evidence of atoms. a nucleus. subatomic particles. elements.
4. What is meant when an atom is said to be in its ground state? There is no net charge on the atom. The number of protons equals the number of neutrons. The atom's electrons all have the lowest possible energies. It is the isotope with the least number of neutrons.
5. What did Bohr introduce to atomic theory with his model? existence of a nucleus electron clouds existence of neutrons electrons moving in orbits about the nucleus
6. The subatomic particle(s) found in the nucleus of an atom are protons electrons. protons and neutrons. protons and electrons.
7. Calcium's atomic number is 20. What does that that tell us about a calcium atom? Its mass is 20 g. It has 20 neutrons. It has 20 protons. It has 10 electrons and 10 protons.
1. Dalton's theory did NOT include which of the following points? All elements are composed of atoms. All atoms, including atoms from different elements, have the same mass. Compounds contain atoms of more than one element. In a specific compound, atoms of different elements always combine in the same way.
2. What is the maximum number of electrons that can occupy an atomic orbital? 1 2 4 There is no limit.
3. J. J. Thomson's experiments provided the first evidence of atoms. a nucleus. subatomic particles. elements.
4. What is meant when an atom is said to be in its ground state? There is no net charge on the atom. The number of protons equals the number of neutrons. The atom's electrons all have the lowest possible energies. It is the isotope with the least number of neutrons.
5. What did Bohr introduce to atomic theory with his model? existence of a nucleus electron clouds existence of neutrons electrons moving in orbits about the nucleus
6. The subatomic particle(s) found in the nucleus of an atom are protons electrons. protons and neutrons. protons and electrons.
7. Calcium's atomic number is 20. What does that that tell us about a calcium atom? Its mass is 20 g. It has 20 neutrons. It has 20 protons. It has 10 electrons and 10 protons.
8. In which way do isotopes of an element differ? number of electrons in the atom number of protons in the atom number of neutrons in the atom net charge of the atom
9. Who discovered the nucleus? Dalton J. J. Thomson Rutherford Bohr J. J. Thomson Rutherford Bohr
10. Which of the following is ALWAYS true regarding atoms of two different elements? They have the same number of electrons. They have different mass numbers. They have different numbers of neutrons. They have different numbers of protons.
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