Exercise

 

  1. An glass rod was rubbed with a silk cloth vigorously and then placed over some tiny pieces of paper.

Which of the following would most probably happen?

  1. Look at the figure

 

A

B

C

D

 

 

 

 

 

 

 

 

The figure show the conditions of polystyrene balls  A,B,and C that its  charge.

What are the charges of the balls A,B, and C?   If the D = Positive

 

  1. Observe the arrangement of periodic table below. The electron configurations of some main group elements at ground state are given in this following table

Element

Atomic  Number

Number of electrons occupying atomic shell

Electron Configuration

K

L

M

N

O

P

Li

3

         

Be

9

         

Na

11

         

He

2

         

Based  on the table, indicate the elements characteristics….

Which of the following indicate Li, Na, K, Rb?

 

  1. Jelaskan cara aturan menentukan suatu unsur dalam suatu sistem periodik unsur.
    1. Which of the following figure  below  that show charging  by induction?

 

A.            Ebonit                B.Kaca                                 C . Sisir                                   D. Plastik
 

  1. Atom tersebut memiliki proton….

 

Memiliki eletron… .

Nomor atomnya… .

Konfigurasinya… .

Golongan…

Periode…

 

 

7. Which of the statements is true about electric charges ?

8. Given a figure of atomic particle  students describe why proton cannot be gained or lost  from an atom based on an electrostatic experiment

9. Given a figure, students describe the phenomenon of static electricity and` its charges

10. Given a figure, students describe that an object can gain electric charge by being rubbed.

11. Given a figure of the charging objects, student determines interaction force between them.

12. Given the figure of charging object, student determines the magnitude of electric field.