8. What are the orbitals present in the fifth principal energy level? a. S orbital bs, p orbitals 9. Which of the properties of atoms is the most suitable reference for the kind of bond that will take place CSP, d orbitals d. s, p, d and f orbitals between/among them? b. Atomic size b. electronegativity 10. What kind of particle is produced after covalent bonding? c. ionization energy d. electron affinity a. Atom b. molecule 11. How does ionic bonding take place? cion d. electron a Two non-metallic elements of different kinds from strong forces of attraction b. Two non-metallic elements of the same kind form strong forces of attraction c. A non-metallic element like fluorine is attracted to a metallic element like sodium d. A metallic element like sodium transfers an electron to a non-metallic element like fluorine. 12. What kind of chemical bond will form between two oxygen atoms? c. lonic bond c. polar covalent bond d. Metallic bond d nonpolar covalent bond 13. Which of the following types of bonds will have the highest electrical and thermal conductivity? c. lonic bond c. polar covalent bond d. Metallic bond d. nonpolar covalent bond 14. Why can metals be hammered without breaking? a. They are ductile. c. they are malleable b. They are not brittle d. their particles are strong 15. When does covalent bonding take place? a. It takes place when atoms share electrons with one another. b. It takes place when the attraction between atoms is strong c. It takes place when atoms collide with one another. d. It takes place when atoms attain stability 16. Nitrogen (N) belongs to family 5A and it is diatomic. How many nonpolar covalent bonds will there be in N2 molecule? b. 1 b. 2. c. 3 d4 17. Which of the following will have the highest melting point? Sodium chloride b. Paraffin wax d lead wire 18. Which of the following shows that an atom is stable? a. Having 2 valence electrons c. having 6 valence electrons b. Having 4 valence electrons d having 8 valence electrons 19. Which organic compound is used as cleaning agent? b. Gasoline b. kerosene c. LPG d. ethyl alcohol 20. Which hydrocarbon compound has a triple bond in the molecule? b. methane c. ethene Octane ethyne a 21. Which alkane will most likely have a very low boiling point? c. butane b. pentane d. hexane a Propane 22. What is the common use of methane? b. fertilizer c. artificial ripening agent b. Disinfectant d. fuel 23. Which of the following organic compounds has the same ability to ripen fruits? c. acetylene b. propane Butane C. sucrose a d. pentyne a а.
