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प्रश्न
Complete the following flow chart.
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उत्तर
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संबंधित प्रश्न
Fill in the blank:
The modern periodic table consists of ……………. periods.
In the Modern Periodic Table, which are the metals among the first ten elements?
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
On which side of the periodic table will you find non-metals?
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
How would the tendency to lose electrons change as we go from left to right across a period of the periodic table?
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
State whether the following statement is true or false:
On going down in a group of the periodic table, the number of valence electrons increases.
What is the usual number of valence electrons and valency of group 18 elements of the periodic table?
(b) What is the number of elements is 3rd period, the modern periodic table?
In the modern Periodic Table, why does cobalt with higher atomic mass of 58.93 appear before nickel having lower atomic mass of 58.71?
Define:
Periodic table
What are horizontal rows and vertical columns in a periodic table known as?
Name two elements in Alkaline earth metals.
Name two elements in each case:
Transition element
Name the type of elements which have one electron short of octet.
State its position in the periodic table?
An element E has following electronic configuration:
|
K |
L |
M |
|
2 |
8 |
6 |
(a) To which group of the periodic table does element E belong?
(b) To which period of the periodic table does element E belong?
(c) State the number of valence electrons present in element E.
(d) State the valency of the element E.
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
Give the symbol and valency of the following element and radical.
Aluminium
Give the symbol and valency of the following element and radical.
Oxygen [Oxide]
Give the symbol and valency of the following element and radical.
Nitrate
How were elements arranged in the long form of the periodic table or the Modern Periodic Table?
Find the correlation:
Mendeleev’s periodic table : atomic mass : : Modern periodic table : _______
Noble gases belong to______ group of the periodic table.
How does the property vary in periods and in groups?
Identify gas A in the following experiment.
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
The amount of energy released when one or more electrons is added to the neutral atom is ______
Compare the radii of two species X and Y. Give reasons for your answer.
- X has 12 protons and 12 electrons
- Y has 12 protons and 10 electrons
Explain the position of hydrogen in the periodic table.
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 Noble gas?
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?
An element has 2 electrons in its N shell.
State its position in periodic table.
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
Match the atomic number with the following:
An element of group 2.
