Download Chapter 4 Quiz ____ 1. The Greek philosopher Democritus coined

Chapter 4 Quiz
____
1. The Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be
divided?
a. element
c. electron
b. atom
d. molecule
____ 2. Which of the following is NOT part of John Dalton’s atomic theory?
a. All elements are composed of atoms.
b. All atoms of the same element have the same mass.
c. Atoms contain subatomic particles.
d. A compound contains atoms of more than one element.
____ 3. Rutherford’s gold foil experiment provided evidence for which of the following statements?
a. Negative and positive charges are spread evenly throughout an atom.
b. Alpha particles have a positive charge.
c. Gold is not as dense as previously thought.
d. There is a dense, positively charged mass in the center of an atom.
____ 4. Which statement best describes Rutherford’s model of the atom?
a. It is like an avocado with the pit representing the nucleus.
b. It is like an aquarium with swimming fish representing positive charges.
c. It is like a fried egg with the yolk representing the nucleus.
d. It is like a huge stadium with a positively charged marble at the center.
____ 5. Which subatomic particle has a negative charge?
a. electron
c. neutron
b. alpha particle
d. proton
____ 6. Which statement about subatomic particles is NOT true?
a. Protons and neutrons have almost the same mass.
b. Protons and electrons have opposite charges.
c. Unlike protons and electrons, neutrons have no charge.
d. Protons and neutrons have the same charge.
____ 7. To find the number of neutrons in an atom, you would subtract
a. mass number from atomic number.
c. atomic number from electron number.
b. atomic number from mass number.
d. isotope number from atomic number.
____ 8. Which statement is true about oxygen-17 and oxygen-18?
a. They do not have the same number of protons.
b. Their atoms have an identical mass.
c. They are isotopes of oxygen.
d. The have the same mass number.
____ 9. In Niels Bohr’s model of the atom, electrons move
a. like balls rolling down a hill.
c. like popcorn in a popcorn popper.
b. like planets orbiting the sun.
d. like beach balls on water waves.
_____ 10. What does the electron cloud model describe?
a. the most likely locations of electrons in atoms
b. the precise locations of electrons in atoms
c. the number of electrons in an atom
d. the mass of the electrons in an atom
______ 11. According to ____________________, all matter was made up of four elements — earth, air, fire,
and water.
a. Aristotle
c. Thomson
b. Rutherford
d. Bohr
12. The third model of the atom in Figure 4-2 represents the _______________________ model of the atom.
a. Rutherford
c. Thomson
b. electron cloud
d. Bohr
13. The second model of the atom in Figure 4-2 is __________________ model of the atom.
a. Aristotle’s
c. Thomson’s
b. Rutherford’s
d. Bohr’s
14. Which of the following is unique for any given element?
a. the number of neutrons
c. the number of protons
b. the charge on the electrons
d. the mass of a neutron
True or False
15._____________ The models of the atoms in Figure 4-2 are arranged in the order that they were developed.
16.______________Protons and electrons are found in the nucleus of the atom
17. _____________ If element Q has 11 protons, its atomic number is 11.
18. _____________The nuclei of isotopes contain different numbers of protons
Fill-in-the-blank
19. If an atom of an element has a mass number of 32 and 20 neutrons in its nucleus, what is the atomic
number of the element? __________________
20. If an atom of tin has a mass number of 118 and an atomic number of 50, how many neutrons are in its
nucleus?______________
____ 21. What is the difference between an atom in the ground state and an atom in an excited state?
a. The atom in the ground state has less energy and is less stable than the atom in an excited
state.
b. The atom in an excited state has one fewer electron than the atom in the ground state.
c. The atom in an excited state has more energy and is less stable than the atom in the ground
state.
d. The atom in an excited state has one more electron than the atom in the ground state.
____ 22. The glowing of a neon light is caused by electrons emitting energy as they
a. move from lower to higher energy levels.
b. collide with other electrons.
c. move from higher to lower energy levels.
d. collide with the nucleus.