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प्रश्न
Moseley’s periodic table is based on atomic mass.
विकल्प
True
False
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उत्तर
False
Correct Statement: Moseley’s periodic table is based on atomic number.
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संबंधित प्रश्न
An element P (atomic number 20) reacts with an element Q (atomic number 17) to form a compound. Answer the following questions giving reason:
Write the position of P and Q in the Modern Periodic Table and the molecular formula of the compound formed when P reacts with Q.
Rewrite the following statement after correction, if necessary:
Groups have elements with consecutive atomic numbers.
Why do we classify elements?
An element A has an atomic number of 6. Another element B has 17 electrons in its one neutral atom.
(a) In which groups of the periodic table would you expect to find these elements?
(b) what type of bond is formed between A and B?
(c) Suggest a formula of the compound formed between A and B.
Classify the following elements into Metals and Nonmetals.
S, Mg, Al, P, N, Na.
Identify the bond between H and F in the HF molecules.
What property forms the basis of identification?
Which of the following hydroxides is most basic?
Identify and name the metals out of the following elements whose electronic configurations are given below.
- 2, 8, 2
- 2, 8, 1
- 2, 8, 7
- 2, 1
Which of the following metals have low melting and boiling point?
