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प्रश्न
Write the name.
Two elements having two orbits.
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उत्तर
Carbon (C), oxygen (O)
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संबंधित प्रश्न
Arrange the following as per the instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing order of metallic character).
Answer the following in respect of element `31/15 P `
What is its valency?
Name any five periods properties.
Explain the following:
Group 17 elements are strong non-metals, while group 1 elements are strong metals.
How do the following change on moving from left to right in a period of the periodic table?
Give examples in support of your answer.
Nature of oxides of the elements ?
An element X belong to 3rd periods and group II of the periodic table state:
whether it is a metal or a non-metal.
Complete the following sentences
Moving across a ………….. of the periodic table the elements show increasing ………………..character (group, period, metallic, non-metallic).
A metal M forms as oxide having the formula M2O3. It belongs to third period. Write the atomic number and valency of the metal.
iii) Observe the figure and answer the following questions.
a) Identify the block shown by box A and write an electronic configuration of any one element of this block.
b) Identify the block of element denoted by letter B and write its period number.
In the third period, which is the most metallic and most non-metallic element?
Explain
Larger the atomic size, more metallic is the element.
Identify the metallic oxide which is amphoteric in nature.
Arrange the following elements in order of their decreasing metallic character.
Na, Si, Cl, Mg, Al
The tendency of an element to form anion is the ______ character of that element.
Right or wrong sentence.
Silicon is a metallic element.
Identify the elements with the following property and arrange them in increasing order of their reactivity
- An element which is a soft and reactive metal
- The metal which is an important constituent of limestone
- The metal which exists in liquid state at room temperature
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing metallic character)
The given table shows elements with the same number of electrons in its valence shell.
| Elements | A | B | C |
| m.p. | 63.0 | 180.0 | 97.0 |
Arrange them in order of increasing metallic character.
