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प्रश्न
Complete the following flow chart.
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उत्तर
संबंधित प्रश्न
Why do all the elements of the same group have similar properties?
Give two example of group 18 elements.
Explain why, the noble gases are placed in a separate group.
The modern periodic table was prepared by ______.
Which element has the electronic configuration 2, 8, 2?
On the basis of electronic configuration, how will you identify chemically similar elements?
On the basis of electronic configuration, how will you identify the first element of a period?
(b) What is the number of elements is 3rd period, the modern periodic table?
What is a group in the periodic table?
Helium and neon are unreactive gases. What, if anything, do their atoms have in common?
From the standpoint of atomic structure, what determines which element will be the first and which the last in a period the periodic table?
Consider the following elements:
20Ca, 8O, 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be:
(i) very stable?
(ii) in group 2 of the periodic table?
(iii) in group 16 of the periodic table?
What are horizontal rows and vertical columns in a periodic table known as?
Name two elements in halogens.
Name two elements in each case: Lanthanides
Name the metals in the first twenty elements.
Name the type of elements which have outermost shell incomplete.
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
What will be the formula of its phosphate?
An element barium has the atomic number 56. Look up its position in the periodic table and answer the following question.
Is it larger or smaller than caesium (Cs)?
The electronic configuration of an element T is 2, 8, 8, 1.
What is the period number of T?
Give the symbol and valency of the following element and radical.
Sodium
Give the symbol and valency of the following element and radical.
Hydrogen
Give the symbol and valency of the following element and radical.
Zinc
Give the chemical formula of sodium hydroxide
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
Find the odd one out and give its explanation.
p-block is composed of groups 1 and 2.
State any five features of modern periodic table.
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
What is the symbol of the element Tungsten?
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 variable valency and is a member of the Oxygen family (group 16).
______ group elements are called alkaline earth metals.
Explain giving reason why although the nuclear charge in atoms increases in moving from left to right in a period as well as in moving from top to bottom in a group in the Modern periodic table, but the size of the atoms does not vary similarly in both situations.
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?
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
Answer the following in respect of element \[\ce{_16^32S}\].
Give its electronic configuration.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
