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Question
Write the names from the description.
Two elements having valency 4.
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Solution
Carbon and Silicon.
RELATED QUESTIONS
Write the name from the description.
The period with electrons in the shells K, L, and M.
Write the name from the description.
The group with valency zero.
Write the name from the description.
The family of metals having valency one.
Write the name from the description.
The family of metals having valency two.
What is the main characteristic of the last elements in the periods of a periodic table? What is the general name of such elements?
Write a short note on the following type of element –
transition elements
Write a short note on the following type of element –
inner transition elements
Statement: Elements in a group generally possess similar properties but elements along a period have different properties.
Reason: The difference in electronic configuration makes the element differ in their chemical properties along a period.
If the electronic configuration of an element is 1s2 2s2 2p6 3s2 3p1’then it will
occupy ______ block of the periodic table.
f-block elements are also known as ______.
What are the s-block elements?
What are the p-block elements
Assertion (A): Group 2 elements in the modem periodic table are called alkaline earth metals.
Reason (R): The oxides of group 2 elements produce alkaline solutions when they are dissolved in water.
Assertion (A): Noble gases are chemically inert in nature.
Reason (R): Noble gases have stable electronic structures.
Write the answer to the questions with reference to the periodic table.
- What do (A), (B), (C), and (D) represent? [1]
- Elements are arranged in increasing order of their ______. [1]
- Write the electronic configuration of the first four elements in Group I. [1]
- What change in atomic radius is observed in moving from left to right in a Period? [1]
- Give a reason for (d). [1]
Match the columns:
| Column ‘A’ | Column ‘B’ |
| Manganese | (a) Metal |
| (b) Non-metal | |
| (c) Transition metal |
Answer the following questions related to the modern periodic table.
Which block elements are known as transition elements?
