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प्रश्न
Silicon is a metallic element.
विकल्प
Right
Wrong
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उत्तर
Silicon is a metallic element- Wrong
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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.
Name any five periods properties.
Explain the following:
Group 17 elements are strong non-metals, while group 1 elements are strong metals.
How does the chemical reactivity of
alkali metals vary?
Arrange the elements of group 17 and group 1 according to the given conditions.
Increasing non – metallic character
Complete the following sentences
Moving across a ………….. of the periodic table the elements show increasing ………………..character (group, period, metallic, non-metallic).
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive metal
Match the atomic number with the following:
A metal of valency one.
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.
Electropositivity means ______.
Write the name.
The atom having the smallest atomic radius from zero group.
Write the name.
Two elements having two orbits.
Electronegativity is the metallic property of an element.
Write scientific reason.
The metallic character of elements increases while going down the groups.
The lightest liquid metal is ______
An element has atomic number 17. To which group, the period does it belong? It is metal or non-metal?
Choose the odd one out and write the reason:
Metals are good ______ because they are electron ______.
Arrange:
Be, Li, C, B, N, O, F (in increasing metallic character).
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
Will the elements in the group to the right of this boron group be more metallic or less metallic in character? Justify your answer.
