EASY
9th CBSE
IMPORTANT
Earn 100

The valencies (or charge) of some of the ions are given below: 

        Ion                Valency(Charge)                      Ion                              Valency(Charge)

Sodium ion                   1+                           Bromide ion                                1-

Ammonium ion             1+                           Hydroxide ion                             1-

Calcium ion                  2+                           Sulphate ion                               2-

Lead ion                       2+                           Phosphate ion                            3-

Using the information, write down the formula of the Calcium hydroxide compound.

 

Important Questions on Atoms and Molecules

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Short Answer Type Questions>Q 26

The valencies (or charge) of some ions are given below:

Ion Valency (charge)   Ion Valency (charge)
Sodium ion 1+   Bromide ion 1-
Ammonium ion 1+   Hydroxide ion 1-
Calcium ion 2+   Sulphate ion 2-
Lead ion 2+   Phosphate ion 3-

Using the information, write down the formula for Lead bromide.

EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Short Answer Type Questions>Q 27
What is the difference between a cation and an anion? Explain with examples.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Short Answer Type Questions>Q 27

The valencies(or charges) of some of the ions are given below: 

Ion                        Valency(charge)                Ion                         Valency(charge)

Sodium ion                1+                       Nitrate ion                           1-

Copper ion                2+                       Sulphide ion                       2-

Using this information, write down the formula of sodium sulphide.

EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Short Answer Type Questions>Q 27

The valencies(or charges) of some of the ions are given below: 

Ion                        Valency(charge)                Ion                         Valency(charge)

Sodium ion                1+                       Nitrate ion                           1-

Copper ion                2+                       Sulphide ion                       2-

Using this information, write down the formula of copper nitrate.

EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Short Answer Type Questions>Q 28
Explain the formation of (i) sodium ion and (ii) chloride ion, from their respective atoms giving the number of protons and number of electrons in each one of them. What is the reason for positive charge on a sodium ion and negative charge on a chloride ion? 
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Short Answer Type Questions>Q 29
Write the symbols/formulae of two simple ions and two compound ions( or polyatomic ions).
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Short Answer Type Questions>Q 29

An element Y has a valency of 4. Write the formula for its chloride.

 

EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Short Answer Type Questions>Q 29

An element Y has a valency of 4. Write the formula for its oxide.