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प्रश्न
Position of A, B and C three elements is given in the table from the modern periodic table. Answer the following questions.
| Periods | Group 2 | Group 17 |
| 2 | ----- | A |
| 3 | B | ----- |
| 4 | ----- | C |
- What is an element metal or nonmetal?
- Which is the outermost orbit of element B?
- Identify C element and it's physical state.
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उत्तर
- Element A is a non-metal.
- Outermost shell of element B is M.
- Element C is bromine (Br), and it exists in a liquid state.
संबंधित प्रश्न
In the Modern Periodic Table, which are the metals among the first ten elements?
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.
What is meant by a period, in a periodic table?
Give two example of group 17 elements.
The atomic particle whose number in the atoms of an element always remains the same and which forms the real basis for the modern classification of elements is:
(a) electron
(b) proton
(c) neutron
(d) meson
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
What is the major characteristic of the first elements in the periods of the periodic table? What is the general name of such elements?
What is a period in a periodic table?
Name the scientist who stated the modern periodic law.
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.
Name the noble gas with 3 shells.
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?
Name an element of group 18 which can form compounds.
The horizontal rows in a periodic table are called _____.
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
Give the symbol and valency of the following element and radical.
Oxygen [Oxide]
Give the symbol and valency of the following element and radical.
Ammonium
Give the symbol and valency of the following element and radical.
Bicarbonate
State what is meant by the term chemical formula.
Give the chemical formula of calcium phosphate
State the number of elements in Period 3 of the Periodic Table.
How were elements arranged in the long form of the periodic table or the Modern Periodic Table?
The groups 1 and 2 constitute the ______ block.
Which of the following statements about the Modern periodic table is correct?
Elements in the modern periodic table are arranged in ______groups and______ periods.
______ is the longest period in the periodical table.
______ and ______ are called inner transition elements.
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?
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
An element which is an essential constituent of all organic compounds belongs to
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.
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.
