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प्रश्न
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.
विकल्प
Na
Mg
Al
Si
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उत्तर
Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. An element to be present in the same group as X is Na.
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संबंधित प्रश्न
Rewrite the following statement after correction, if necessary:
Periods are the horizontal rows of elements.
The element which can from an acidic oxide should be the one whose atomic number is:
(a) 6
(b) 16
(c) 12
(d) 19
An element A from group 14 of the periodic table combines with an element B from group 16.
(i) What type of chemical bond is formed?
(ii) Give the formula of the compound formed.
Rearrange the columns 2 and 3 so as to match with the column 1.
| Column 1 | Column 2 | Column 3 |
| i. Triad ii. Octave iii. Atomic number iv. Period v. Nucleus vi. Electron |
a. Lightest and negatively charged particle in all the atoms b. Concentrated mass and positive charge c. Average of the first and the third atomic mass d. Properties of the eighth element similar to the first e. Positive charge on the nucleus f. Sequential change in molecular formulae |
1.Mendeleev
2. Thomson
3. Newlands
4. Rutherford
5. Dobereiner
. Moseley
|
Choose the correct option and rewrite the statement.
The number of electrons in the outermost shell of alkali metals is _______.
In which block of the modern periodic table are the nonmetals found?
Why was this basis of classification discarded for future classification of elements?
The basis of the classifications proposed by Dobereiner, Newlands and Mendeleev was ______.
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An atom of an element has the electronic configuration 2,8,2. To which group does it belong?
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An element with the atomic number 40 is placed in the period.
Arrange the following elements in the order of their decreasing metallic character
Na, Si, Cl, Mg, Al
Which of the following metals have low melting and boiling point?
Relate the names of the following scientists with the statements given below.
Arranged elements in the increasing order of atomic mass.
Complete the following triads by inserting the missing elements.
Li, ______, K
Justify. Element 'X' forms an oxide with the formula X2O3 which is a solid with a high melting point. ‘X’ would most likely be placed in the group of the Periodic Table as Al.
