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प्रश्न
The modern periodic table has 1 to 7 periods.
विकल्प
Right
Wrong
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उत्तर
The modern periodic table has 1 to 7 periods- Right
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संबंधित प्रश्न
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
Write the names given to the vertical columns and horizontal rows in the Modern Periodic Table. How does the metallic character of elements vary on moving down a vertical column? How does the size of atomic radius vary on moving left to right in a horizontal row? Give reason in support of your answer in the above two cases.
What is periodicity in properties of elements with reference to the Modern Periodic Table?
Write the merits of the modern periodic table over Mendeleev’s Periodic table
How were the positions of cobalt and nickel resolved in the modern periodic table?
How do the atomic radii of elements change as we go from left to right in a period of the periodic table?
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
(b) What is the number of elements is 3rd period, the modern periodic table?
The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here not the chemical symbols of the elements):
| a 3 |
b 4 |
c 5 |
d 6 |
e 7 |
f 8 |
g 9 |
h 10 |
|
| i 11 |
j 12 |
k 13 |
l 14 |
m 15 |
n 16 |
o 17 |
p 18 |
(i) Which element has a bigger atom, a or f?
(ii) Which element has a higher valency, k or o?
(iii) Which element is more metallic i or k?
(iv) Which element is more non-metallic, d or g?
(v) Select a latter which represents a metal of valency 2.
(vi) Select a letter which represents a non-metal of valency 2.
The elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond?
(i) A and D
(ii) C and D
(iii) A and B
(iv) B and C
(v) A and C
Define:
Periodic table
Give the group number of following elements present in periodic table
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
Name the scientist who stated the modern periodic law.
How many groups and periods does the modern periodic table have?
Name two elements in Inert gas.
What do you understand by typical elements?
Name the metals in the first twenty elements.
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
What will be the formula of its phosphate?
Name an alkali metal in period 3 and halogen in period 2.
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
What are the periods in a periodic table?
The d-block elements are called as _______ elements.
To the left of the zig-zag line in the periodic table are the metal elements.
An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.
- Which element has more metallic character from these two elements?
- What is the valency of each X and Y elements?
- Atom size of Y element is smaller than atom size of X element. Explain.
Noble gases belong to______ group of the periodic table.
______ is the longest period in the periodical table.
______ forms the basis of the modern periodic table.
The inert gas which lies in the third period is ______
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
The three elements A, B and C with similar properties have atomic masses X, Y and Z respectively. The mass of Y is approximately equal to the average mass of X and Z. What is such an arrangement of elements called as? Give one example of such a set of elements.
______ group elements are called alkaline earth metals.
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 groups of modern periodic table.
An element has 2 electrons in its N shell.
State its position in periodic table.
Match the atomic number with the following:
An element of group 2.
