ICSE/Chemistry/ Gr 9/ Atomic structure and Chemical bonding.

Subject: Chemistry 

Topic Atomic structure and Chemical bonding

Marks: 20 marks

Question 1

Q1. Define                                                           (2)

a. Atomic number

b. Electro valent bond

Q2. The atomic number of an element is 11 and mass number is 23.                                   (3)

a. write the elements in symbolic form 

b. Calculate the number of protons, and neutrons.

c. If the element combine with oxygen. State the type of bonding in it.

Q3.  Write down the electronic configuration of

a. Magnesium 

b.Neon.                                                                (2)

Q4. Aluminium combine with Chlorine.

a. Write the symbol of Aluminium and Chlorine.

b. State their atomic number.

c. What is their electronic configuration.

d. What type of bonding will exists between them?

e. Explain the bonding between them with the help of atomic structure. Draw the atomic structure as well.                                             (13)