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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).
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.
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?
The electronic configuration of an element T is 2, 8, 8, 1.
Is it a metal or a non-metal?
The elements at the bottom of a group would be expected to show ______ metallic character than the element at the top.
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 Period 3, the most metallic element is ______.
Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 
Which non-metallic element has the valency of 2?
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive 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?
Supply the missing word from the words given in brackets.
If an element has one electron in its outermost energy level, then it is likely to be _ (metallic, non metallic)
Match the atomic number with the following:
A metal of valency one.
Arrange the following elements in order of their decreasing metallic character.
Na, Si, Cl, Mg, Al
Write a scientific reason.
The non-metallic character increases while going from left to right in a period.
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
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?
