Chemistry and Atoms for Nursing School Entrance Exam Practice Problems

The study guide for these practice questions can be found at:

Chemistry and Atoms for Nursing School Entrance Exam Study Guide

Questions

1. Which of the following statements about atoms is true?
   1. They have more protons than electrons.
   2. They have more electrons than protons.
   3. They are electrically neutral.
   4. They have as many neutrons as they have electrons.
2. What is the mass number of an atom with 60 protons, 60 electrons, and 75 neutrons?
   1. 120
   2. 135
   3. 75
   4. 195
3. What is the atomic number of an atom with 17 protons, 17 electrons, and 20 neutrons?
   1. 37
   2. 34
   3. 54
   4. 17
4. Two atoms, L and M, are isotopes. Which of the following properties would they NOT have in common?
   1. atomic number
   2. atomic mass
   3. chemical reactivity
   4. the number of protons in the nucleus
5. An atom with an atomic number of 58 and an atomic mass of 118 has
   1. 58 neutrons.
   2. 176 neutrons.
   3. 60 neutrons.
   4. 116 neutrons.
6. According to Dalton's theory, the only way a compound can consist of its elements in a definite ratio by mass is that it is made from the elements in
   1. a definite ratio by volume.
   2. a definite ratio by number of atoms.
   3. multiple whole-number ratios by mass.
   4. multiple whole-number ratios by volume.
7. Which of the following is a mixture?
   1. sodium chloride
   2. rice and beans
   3. magnesium sulfate
   4. water
8. The mass of an atom is almost entirely contributed by its
   1. nucleus.
   2. protons.
   3. electrons and protons.
   4. neutrons.
9. If an atom consists of 9 protons and 10 neutrons, its
   1. atomic number is 10.
   2. mass number is 10.
   3. number of electrons is 9.
   4. electrical charge is 9.
10. Which of the following is true of an atom?
    1. It consists of protons, neutrons, and electrons.
    2. It has a nucleus consisting of protons, neutrons, and electrons.
    3. The protons are equal in number to the electrons, so the nucleus is electrically neutral.
    4. All of the above are true.