1. Chapter 4 Practice Questions

2. Which subatomic particle has a negative charge? 1.electron 2.proton 3.neutron 4.nucleus 1234567891011121314151617181920 212223242526272829303132

3. Which of the following is unique for any given element? 1.Number of neutrons 2.Number of protons 3.Number of electrons 1234567891011121314151617181920 212223242526272829303132

4. To find the number of neutrons in an atom, you would subtract… 1.Mass number from atomic number 2.Atomic number from mass number 3.Atomic number from electron number 1234567891011121314151617181920 212223242526272829303132

5. What does the electron cloud model describe? 1.The most likely locations of electrons in atoms 2.The precise locations of electrons in atoms 3.The number of electrons in an atom 4.The mass of the electrons in an atom 1234567891011121314151617181920 212223242526272829303132

6. Carbon’s atomic number is 6. This means that a carbon atom has… 1.Six neutrons in its nucleus 2.A total of six protons and neutrons 3.Six protons in its nucleus 4.A total of six neutrons and electrons 1234567891011121314151617181920 212223242526272829303132

7. An atom’s mass number equals the number of… 1.Protons plus the number of electrons 2.Protons plus the number of neutrons 3.protons 4.Neutrons 1234567891011121314151617181920 212223242526272829303132

8. The glowing of a neon light is caused by electrons emitting energy as they… 1.Move from lower to higher energy levels 2.Collide with other electrons 3.Move from higher to lower energy levels 4.Collide with the nucleus 1234567891011121314151617181920 212223242526272829303132

9. A chemical symbol represents the ____ of an element. 1.name 2.reaction 3.group 4.structure 1234567891011121314151617181920 212223242526272829303132

10. Atoms of the same element with different numbers of neutrons are called… 1.isotopes 2.ions 3.Radioactive elements 1234567891011121314151617181920 212223242526272829303132

11. Which statement about subatomic particles is NOT true? 1.Protons and neutrons have almost the same mass. 2.Protons and electrons have opposite charges. 3.Protons and neutrons have the same charge. 1234567891011121314151617181920 212223242526272829303132

12. Which statement about the atomic nucleus is correct? 1.It is made of protons and neutrons and has a negative charge. 2.It is made of protons and neutrons and has a positive charge. 3.It is made of electrons and has a positive charge. 1234567891011121314151617181920 212223242526272829303132

13. What does the electron cloud model describe? 1.The most likely locations of electrons in atoms. 2.The precise locations of electrons in atoms. 3.The number of electrons in an atom. 1234567891011121314151617181920 212223242526272829303132

14. Atoms have no electric charge because they… 1.Have neutrons in their nuclei. 2.Have an equal number of electrons and protons. 3.Have an equal number of neutrons and protons. 1234567891011121314151617181920 212223242526272829303132

15. A particle that moves around the nucleus is the… 1.electron 2.proton 3.neutron 1234567891011121314151617181920 212223242526272829303132

16. A certain atom has 10 protons, 10 electrons, and 12 neutrons. Its mass number is ____. 1.10 2.12 3.22 4.32 1234567891011121314151617181920 212223242526272829303132

17. Which number is the atomic number? 5 B 10.81 1.5 2.10.88 1234567891011121314151617181920 212223242526272829303132

18. How many protons are found in boron? 5 B 10.81 1.5 2.6 3.10 4.11 5.16 1234567891011121314151617181920 212223242526272829303132

19. How many electrons are found in boron? 5 B 10.81 1.5 2.6 3.10 4.11 5.16 1234567891011121314151617181920 212223242526272829303132

20. How many neutrons are found in boron? 5 B 10.81 1.5 2.6 3.10 4.11 5.16 1234567891011121314151617181920 212223242526272829303132

21. Which of the following is NOT true? 1234567891011121314151617181920 212223242526272829303132 1.A proton has a mass equal to 1 a.m.u. 2.An electron has a mass equal to 1 a.m.u 3.A neutron has a mass equal to 1 a.m.u. 4.An electron has a mass equal to 0 a.m.u.