Stability of Atoms

Q.

Why is the valency of oxygen 2?

Q. In a stable molecule, the force that holds two or more atoms together is known as .

1. octet
2. valency
3. chemical bond

Q.

When an atom acquires the nearest noble gas configuration then why doesn’t it change into an atom of the noble gas

Q.

In the formation of a compound AB, an atom of element A lost 2 electrons while an atom of element B gained 2 electrons. Predict two properties of AB.

Q. Identify the gas that is chemically inert.

1. Helium
2. Hydrogen
3. Oxygen
4. Fluorine

Q. Which of the following noble gases do not have octave electronic configuration?

1. Helium
2. Neon
3. Xenon
4. Argon

Q. What is a bond

Q.

Which one of the following is a bad conductor of electricity?

1. Ionic compound

2. Covalent compound

3. Coordinate compound

Q.

Based on electronic configuration which of these will exist in molecular state instead of atomic state?

1. Tetraatomic

2. Monoatomic

3. Triatomic

4. Polyatomic

Q. What are Intermolecular hydrogen bonding and Intramolecular hydrogen bonding responsible for? Their effects on properties of the compound?

Q. Stability is achieved when there are electrons in the outermost shell.

1. 4
2. 6
3. 8
4. 1

Q.

The exchange energy for stabilized electronic configuration is

A } higher for cadmium than that of palladium

B}

higher for palladium than that of cadmium

C}

16E for palladium and 12E for cadmium

D}equal for both

Q. Choose the correct statements among the following.

1. Two atoms will form a covalent bond if both atoms do not give up electrons easily.
2. Two atoms will form an ionic bond if both atoms do not give up electrons easily.
3. Ionic compounds are good conductors of electricity in solid state.
4. Ionic compounds are good conductors of electricity in molten state.

Q. On combining with other elements chlorine acquires the electronic configuration of ___.

1. Neon
2. Argon
3. Krypton
4. Xenon

Q. Duplet and octet configuration differs in terms of:

1. Number of electrons in outermost shell
2. Number of electrons in innermost shell
3. Number of Shells
4. Both B and C

Q.

Which among the following elements has an octet electronic configuration?

1. Na

2. Ne

3. Ca

4. Mg

Q. On combining with other elements chlorine acquires the electronic configuration of ___.

1. Neon
2. Argon
3. Krypton
4. Xenon

Q. Atoms are found to be stable when they have eight electrons in their outermost shells.

1. True
2. False

Q. Chlorine requires ______ electron(s) to attain stable electronic configuration.

1. 0
2. 1
3. 2
4. 3