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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
Rewrite the following statement after correction, if necessary:
Groups have elements with consecutive atomic numbers.
Rewrite the following statement after correction, if necessary:
Periods are the horizontal rows of elements.
The element which forms a basis oxide has the atomic number of:
(a) 18
(b) 17
(c) 14
(d) 19
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 number of periods and groups in the periodic table are ______
Which of the following is a transition element?
In which group are inert elements placed?
Relate the names of the following scientists with the statements given below.
Arranged elements into groups containing three elements each.
Relate the names of the following scientists with the statements given below.
Arranged elements in a group of seven with increasing atomic masses and eighth elements with similar properties kept below the first like eight note in an act of music.
The atomic number of an element 'X' is 11.
- Write the electronic configuration of X and find its valency.
- Write the formula and nature of its oxide.
