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प्रश्न
Give the symbol and valency of the following element and radical.
Potassium
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उत्तर
| Element/Radical | Symbol | Valency |
| Potassium | K | one |
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संबंधित प्रश्न
The position of three elements A, B and C in the Periodic Table are shown below –
|
Group 16
|
Group 17
|
|
−
|
−
|
|
−
|
A
|
|
−
|
−
|
|
B
|
C
|
(a) State whether A is a metal or non-metal.
(b) State whether C is more reactive or less reactive than A.
(c) Will C be larger or smaller in size than B?
(d) Which type of ion, cation or anion, will be formed by element A?
Explain why, the noble gases are placed in a separate group.
Define:
Periodic table
An element A has 2 electrons in its fourth shell. State its electronic configuration.
Give the symbol and valency of the following element and radical.
Carbonate
State what is meant by the term chemical formula.
Give the chemical formula of calcium phosphate
In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.
What are groups and periods in the modern periodic table?
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
