As per modern periodic law, the properties of the elements are periodic functions of their
A) atomic weights
B) mass numbers
C) atomic numbers
D) valencies
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In which group of elements of the modern periodic table are halogen placed ?
Option : a. 17
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Shiva can type `x` words per hour while Sreevias can type `y` words per hour. Shiva works for 5 hours per day and Sreenvias works for 7 hours per day.
Correct Answer - `5x + 7y ge 700`
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Modern periodic law states that the properties of elements are periodic functions of their
D) both B and C
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Give reason: Mendeleev’s periodic law was modified into modern periodic law.
Henry Moseley in 1913, studied X-ray spectra of large number of elements. He observed that the frequency of X-ray emitted from an element is related to atomic number (Z) of an...
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i. Position of the elements in the modern periodic table is related to the quantum number of their last filled orbital.
i. True ii. False Period number is same as the principal quantum number ‘n’ of the valence shell of the elements.
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i. Shortest period in the modern periodic table. ii. Block which is placed separately at the bottom of the modern periodic table.
i. First period ii. f-Block
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According to Mendeleev’s periodic law, the physical and chemical properties of elements are the periodic function of their …………..
Correct option is: (A) atomic weights According to Mendeleev's periodic law, the Physical and Chemical properties of elements are the periodic function of their atomic weight
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According to Mendeleev’s periodic law, the physical and chemical properties of elements are the periodic function of their …………..
2 Answers
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According to periodic law of elements, the variation in properties of elements is related to their ……………
Correct option is: (D) atomic numbers According to Modern periodic law of elements, the variation in properties of elements is related to their atomic number.
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