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प्रश्न
Find the odd one out and give its explanation.
विकल्प
Carbon
Calcium
Oxygen
Neon
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उत्तर
Calcium
Explanation:
Carbon, oxygen, and neon are all classified as non-metals and are found in the p-block of the periodic table. Calcium, on the other hand, is an alkaline earth metal (Group 2) and is categorised as a metal, making it distinct from the others in terms of physical and chemical properties.
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संबंधित प्रश्न
Fill in the blank:
The modern periodic table consists of ……………. periods.
How does the metallic character of elements in Modern Periodic Table vary on moving from left to right in a period, and (ii) down a group?Give reason to justify your answer.
Why do all the elements of the same group have similar properties?
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
State modern periodic law.
Give two example of group 18 elements.
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same group of the periodic table?
Which element has two shells, both of which are completely filled with electrons?
How would the tendency to lose electrons change as we go from left to right across a period of the periodic table?
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
Helium and neon are unreactive gases. What, if anything, do their atoms have in common?
Define:
Periodic table
Name two elements in halogens.
Name two elements in Inert gas.
Name two elements in each case:
Transition element
How does the electronic configuration of an atom relate to its position in the modern periodic table?
Write the number of protons, neutrons and electronic configuration of \[\ce{_19^39K, _15^31P}\]. Also state their position in periodic table.
What is the main characteristic of the last element in each period of the periodic table?
The horizontal rows in a periodic table are called _____.
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
Give the symbol and valency of the following element and radical.
Ammonium
Answer the following question in one sentence.
The modern periodic table is divided into which blocks?
Right or wrong sentence.
The K and L shells of the elements Na and Mg contain electrons.
State any five features of modern periodic table.
The element which has the least tendency to lose electrons is ______
The longest period of the Modern Periodic Table is period.
What is the symbol of the element Tungsten?
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has same valency as Lithium.
Group 16 elements are collectively called as ______.
Spot the error:
The elements of group 13 are called the carbon family.
Give the criteria on the basis of which elements are placed (i) in a group and (ii) in a period in the modern periodic table. The atomic number of an element is 16. According to the criteria, in which group and period it should be placed?
1H2 is an isotope of hydrogen. In the modern Periodic Table it will ______.
Match the atomic number with the following:
A rare gas.
Give reason for the following:
Inert gases do not form ion.
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:
If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?
