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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 atom has the electron structure of 2, 7.
(a) What is the atomic number of this atom?
(b) To which of the following would it be chemically similar?
7N, 15P, 17Cl, 18Ar
(c) Why would you expect it to be similar?
Find the neutral atom in the periodic table which has the same number of electrons as K+ and Cl−. What is this number?
The non-metal A is an important constituent of our food and most of the fuels around us. A forms two oxides B and C. The oxide B is poisonous whereas oxide C causes global warming.
(a) Identify A, B and C.
(b) To which group of periodic table does A belong?
(c) Name another element which is placed in the same group as A.
The molecular formula of the chloride of element X is XCl. This compound is a solid having a high melting point. Which of the following elements be present in the same group as X.
How did the early chemists classify elements?
What property forms the basis of identification?
Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right?
The elements A, B, and C belong to groups 1, 14, and 17 respectively of the Periodic Table. Which two elements will form ionic compounds?
Consider the following elements 20Ca, 8Or 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be in group 16 of the Periodic Table?
Which of the following property will be common in group 1 elements?
