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प्रश्न
Right or wrong sentence.
Silicon is a metallic element.
पर्याय
Right
Wrong
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उत्तर
The given sentence is wrong.
Explanation:
Silicon is a metalloid (a semimetal); it has properties intermediate between metals and nonmetals rather than being a true metallic element. For how metallic character is decided (why silicon sits along the metal/nonmetal border), see the explanation of periodic trends and metalloid placement.
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संबंधित प्रश्न
In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:
The element B would have ______ metallic character than A.
Metallic character and non-metallic character are periodic properties discuss ?
Give the trend in metallic character:
(i) across the period left to right
Name the periodic property which relates to the character of element which loses one or more electrons when supplied with energy.
Explain the following:
Metallic character of elements decreases from left to right in a period while it increases in moving down a group.
How does the chemical reactivity of
alkali metals vary?
An element X belong to 3rd periods and group II of the periodic table state:
whether it is a metal or a non-metal.
Which has the maximum metallic character Na, Li or K?
In Period 3, the most metallic element is ______.
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive non-metal
In the third period, which is the most metallic and most non-metallic element?
Select the correct answer
Which of the following electronic structure is of a metal?
Use the information given in (a) to (h) to identify the substances P to W selecting your answers from the given list.
| List | ||
| Calcium | Oxygen | Copper (II) Oxide |
| Carbon | Calcium hydroxide | Copper (II) Nitrate |
| Lead (II) Oxide | Hydrogen chloride | Chlorine |
| Lead (II) Nitrate | Calcium Oxide | Ammonium chloride |
- P is white solid. When heated produces white fumes (sublime).
- P and R on warming produce an alkaline gas.
- On adding water to T, heat is evolved and R is formed.
- Q burns brightly in the air to form T.
- When S is heated, it gives off brown fumes and leaves a black residue of U.
- A solution of S is formed by warming U with dilute nitric acid.
- V is a gaseous non-metallic element that reacts with hydrogen to form W.
- A solution of W will neutralize the solution of R.
The tendency of an element to form cation is the ______ character of that element.
The metallic character of the element decreases moving across a period from left to the right.
Write a scientific reason.
The non-metallic character increases while going from left to right in a period.
3, 1, 2 electrons are in valence shells of X, Y, Z elements resp. From this information, write the name of the groups it belongs to and its valency.
The metal which is hard and has a high melting point and used in filaments of electrical bulbs is ______
An element has atomic number 17. To which group, the period does it belong? It is metal or non-metal?
