Atomic Structure & Isotopes: True or False Quiz Questions

⚛️ Quick Study Guide

• 🔎 Atoms consist of protons, neutrons, and electrons.
• 💡 Protons (positive charge) and neutrons (no charge) reside in the nucleus.
• 🧪 Electrons (negative charge) orbit the nucleus in electron shells.
• 📝 The atomic number ($Z$) is the number of protons in an atom's nucleus, defining the element.
• 🔢 Mass number ($A$) is the total number of protons and neutrons in an atom's nucleus: $A = Z + N$.
• ☢️ Isotopes are atoms of the same element (same $Z$) with different numbers of neutrons (different $A$).
• ⚖️ Atomic mass is the weighted average of the masses of all isotopes of an element.
• ⚗️ Isotopes have similar chemical properties but different physical properties due to the difference in mass.

🧪 Practice Quiz

1. Which of the following particles is NOT found in the nucleus of an atom?
   1. A. Proton
   2. B. Neutron
   3. C. Electron
   4. D. Nucleon
2. What defines the atomic number of an element?
   1. A. The number of neutrons in the nucleus
   2. B. The number of protons in the nucleus
   3. C. The total number of protons and neutrons
   4. D. The number of electrons orbiting the nucleus
3. Two isotopes of the same element will always have the same number of:
   1. A. Neutrons
   2. B. Protons
   3. C. Electrons
   4. D. Both B and C
4. The mass number of an atom is determined by the sum of:
   1. A. Protons and electrons
   2. B. Neutrons and electrons
   3. C. Protons and neutrons
   4. D. Only neutrons
5. Which statement is true about isotopes of oxygen?
   1. A. They have different chemical properties.
   2. B. They have the same mass number.
   3. C. They have the same number of protons.
   4. D. They have different numbers of electrons.
6. If an atom has an atomic number of 17 and a mass number of 35, how many neutrons does it have?
   1. A. 17
   2. B. 18
   3. C. 35
   4. D. 52
7. What is the correct notation for an isotope of carbon with 6 protons and 8 neutrons?
   1. A. $^{12}_6C$
   2. B. $^{14}_6C$
   3. C. $^{6}_{14}C$
   4. D. $^{8}_6C$