Ionic Bonding

Q.

Elements with valency 1 are

1. Always metals

2. Always metalloids

3. Either metals or non-metals

4. Always non-metals

Q. Which of the following are the properties of ionic compounds?

1. High melting and low boiling points
2. High melting points and non-directional bonds
3. High solubilities in polar solvents
4. Good conductors of electricity in molten state

Q. Calcium atom attains the electronic configuration of by losing two electrons from its valence shell.

1. neon
2. argon
3. helium

Q.

Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?

Q.

The force of attraction between cation and anion is called _______.

Q. Elements try to achieve octet configuration to attain stability.

1. True
2. False

Q.

1. What is the name given to group 17 elements? Why are they called so?

2. Comment on the-

(a) Reactivity

(b) Colour

(c) Physical state of group 17 elements.

Q.

Describe the formation of protons using hydro­gen gas.

Q. Choose the correct options regarding the type of bonding in the following compounds.

1. Hydrogen chloride- Ionic bond
2. Magnesium oxide- Ionic bond
3. Nitrogen- Covalent bond
4. Hydrogen- Covalent bond

Q.

Give a one-word answer.

What are group 17 elements are known as?

Q.

Which of the following is a potassium ion?

1. ${\mathrm{K}}^{3+}$

2. ${\mathrm{K}}^{2+}$

3. ${\mathrm{K}}^{+}$

4. $\mathrm{K}$

Q. In NaCl, $N{a}^{+}$ is the cation and $C{l}^{-}$ is the anion.

1. False
2. True

Q. Which of the following elements do not lose an electron easily?

1. Na
2. F
3. Mg
4. Cl

Q.

Which of the following are ionic compounds?

1. Magnesium oxide

2. Sodium fluoride

3. Hydrogen fluoride

4. Water

Q. The electronic configuration of calcium atom is:

1. 2, 8, 8, 1
2. 2, 8, 8, 2
3. 2, 8, 7
4. 2, 8, 8

Q.

the atomic number of carbon is six, its electronic configuration is 2, 4 . why is it so?

Q. How many electrons are present in the valence shell of magnesium?

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

Q.

Explain :

(a) octet rule for formation of sodium chloride

(b) duplet rule for formation of hydrogen.

Q.

Which of the following are ionic compounds?

1. Magnesium oxide

2. Sodium fluoride

3. Hydrogen fluoride

4. Water

Q. The electrostatic force of attraction between the two oppositely charged ions is called the ionic bond.

1. False
2. True

Q. Elements X and Y form an ionic compound. Name the compound formed by X and Y.
(Atomic number of X is 11 and Y is 9)

1. Sodium fluoride
2. Magnesium oxide
3. Sodium chloride
4. Magnesium fluoride

Q. Which of the following compound is formed by ionic bonding?

1. Sulphur dioxide
2. Water
3. Sodium chloride
4. Carbon dioxide

Q. The electronic configuration of sodium atom is 2, 8, 1 and chlorine atom is 2, 8, 7. The atoms will form a bond by of electrons.

1. covalent
2. ionic
3. sharing
4. transferring

Q. In d block elements, why the last electron enters penultimate shell?