Atoms and Chemical Bonding Multiple Choice Test

If you want to test your ability in Atoms and Chemical bonding topics, you can try the following Multiple Choice Test and see how far you know about this topics.

 

            1.  On the basis of Rutherford’s model of an atom, which subatomic particle is present in the nucleus of an atom?

a. proton and electron                         c. proton and neutron

b. neutron and electron                       d. proton only

            2.   If the first and second energy levels of an atom are full, then what would be the total number of electrons in the atom?

a. 6                  b. 8                  c. 10                d.18

            3.  Which atomic model is proposed by Schrodinger?

a. nuclear model                                  c. raisin bread model

b. planetary model                              d. quantum mechanical model

            4.  Which electron transition results in the emission of energy?

a. 3p to 3s                                            c. 2s to 2p

b. 3p to 4p                                           d. 1s to 2s

            5.  The symbol “n” in the Bohr theory of atomic structure refers to

a. the energy of electron.                   

b. the total energy of the atom.

c. the number of electron in an energy level.

d. the orbit in which an electron is found.

            6.  How many orbitals are in the third principal energy level?

a. 3                  b. 6                  c. 9                  d. 12

            7.  Which orbital designation has the highest energy?

a. 2s                 b. 2p                c. 3d                d. 4s

            8.  For a neutral atom with the electron configuration of 1s² 2s² 2p⁵ 3s¹ , which statement is false?

a. The atomic number is ten.

b. The 1s and 2s orbitals are filled

c. The atom is in the ground state.

d. The atom is in the excited state

            9.  Which of the following statements is NOT true of the atomic model of Bohr?

a. The hydrogen is made up of a positively charged nucleus

b. The electron revolves around the nucleus in a circular orbit.

c. The energy of the electron in a given orbit is not fixed.

d. An electron can absorb or emit a quantity of radiation.

            10.  Which statement is incorrect?

a. Orbital is a region in an atom where an electron can be found.

b. An electron can absorb energy when it jumps to a higher energy level.

c. An electron can emit energy when it jumps to a higher energy level.

d. Filling of electrons in an atom starts from a low energy level to the highest energy level.

            11.  What occurs when an electron moves from high energy level to a low one?

a. another electron goes from a low energy level to a high one

b. the atom moves faster

c. colored light is given off

d. this process is not possible

            12.   Which of the properties of atoms is the most suitable reference for the kind of bond that will take place between/among them?

a. atomic size                                       c. electronegativity

b. ionization energy                             d. electron affinity

            13.  What kind of particle is produced after covalent bonding?

a. atom                                                c. molecule

b. ion                                                   d. electron

            14.  What kind of chemical bond will form between two oxygen atoms?

a. ionic bond                                       b. metallic bond

c. polar covalent bond                         d. nonpolar covalent bond

            15.  Which among the following shows that an atom is stable?

a. having 2 valence electrons              c. having 4 valence electrons

b. having 6 valence electrons              d. having 8 valence electrons

            16. Choose 2 elements that would likely form an ionic bond among the following elements: Li, Si, F, Ne

a. Li and Si                                          c. Ne and Si   

b. Si and F                                           d. Li and F

            17.  Why do atoms react with one another to form chemical bonds?

a. to attain stability                             c. to form compounds

b. to form molecules                           d. to produce ions

            18.  What bond holds the atoms of the elements in Groups 1and 2 of the Periodic Table?

a. nonpolar covalent bond                   b. polar covalent bond

c. metallic bond                                   d. ionic bond

            19.  Which of the following sets of samples has metallic bond, covalent bond and ionic bonding in this order?

a. bronze, paraffin wax, and salt        

b. alloy, vetsin, and water

c. gold ring, baking soda, and starch

d. coins, salt, and carbon dioxide

            20.   How is the bond in Br2 different from the bond in MgF2?

a. The bond in Br2 is metallic while the bond in MgF2 is covalent.

b. The bond in Br2 is ionic while the bond in MgF2 is covalent.

c. The bond in Br2 is covalent while the bond in MgF2 is ionic.

d. There is no bond difference between the two.

            21.  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.

  

            22. -30  Make a concept map using  the different words and formulas  below:

                        Sharing e-                   covalent bond             CaF₂                ionic bond

                        Polar covalent             chemical bond             two metals       sea of valence e-

                        H2O                            transfer e-                    nonpolar covalent        O2

                        Metallic bond

          Answers Key:

1.  c

2.  c

3.  d 

4. a

5. d

6. c

7. c

8.  c

9.  c

10. c

11. c

12.  c

13.  c

14. d

15. d

16. d

17. a

18. c

19. a

20. c

21. a

22-30