Advertisements
Advertisements
प्रश्न
The modern periodic table shows the molecular masses of the elements in each frame.
पर्याय
Right
Wrong
Advertisements
उत्तर
The modern periodic table shows the molecular masses of the elements in each frame- Wrong
APPEARS IN
संबंधित प्रश्न
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
In the Modern Periodic Table, which are the metals among the first ten elements?
How does the metallic character of elements in Modern Periodic Table vary on moving from left to right in a period, and (ii) down a group?Give reason to justify your answer.
How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.
Fill in the following blank with suitable word:
Group 17 elements are known as ...............
How were the positions of cobalt and nickel resolved in the modern periodic table?
What is the number of valence electrons in the atoms of first elements in a period?
State how the valency of elements varies in a period of the periodic table?
On the basis of electronic configuration, how will you identify chemically similar elements?
(b) What is the number of elements is 3rd period, the modern periodic table?
From the standpoint of atomic structure, what determines which element will be the first and which the last in a period the periodic table?
What are the groups in a periodic table? Give two characteristics of each.
How many groups and periods does the modern periodic table have?
What are horizontal rows and vertical columns in a periodic table known as?
What do you understand by typical elements?
Name the type of elements which have outermost shell complete.
Name the type of elements which have two electrons in the outermost orbit.
How does the electronic configuration of an atom relate to its position in the modern periodic table?
Name an alkali metal in period 3 and halogen in period 2.
Name the noble gas with 3 shells.
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
Give the symbol and valency of the following element and radical.
Hydrogen
Give the symbol and valency of the following element and radical.
Bisulphate
State what is meant by the term chemical formula.
Give the chemical formula of sodium nitrate
Distinguish between:
s-block - p-block
Distinguish between:
Group 17 - Group 18
The longest period of the Modern Periodic Table is period.
Which of the following elements does not lose an electron easily?
Which of the following elements will form an acidic oxide?
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has same valency as Lithium.
______ group elements are called alkaline earth metals.
Spot the error:
The elements of group 13 are called the carbon family.
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Which of the element is a Metalloid?
Define periods of modern periodic table.
Select the appropriate options and complete the following paragraph:
(metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block).
On the basis of electronic configuration, elements in the modern periodic table are classified Into ______ blocks. Groups 1 and 2 elements are included in ______ and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in ______. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in ______ and all the elements are ______ elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute ______ and all these elements are metals.
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
Match the atomic number with the following:
A rare gas.
