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प्रश्न
Rewrite the following statement after correction, if necessary:
Periods are the horizontal rows of elements.
उत्तर
The statement is correct.
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संबंधित प्रश्न
Rewrite the following statement after correction, if necessary:
Isotopes are the elements of the same group.
An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting.
(a) How many electrons would be there in the outermost shell of the element X?
(b) To which group of the periodic tables does the element X belong?
(c) Write the formula of the compound formed when X reacts with chlorine.
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.
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.
Give a reason why elements need to be properly classified.
The basis of the classifications proposed by Dobereiner, Newlands and Mendeleev was ______.
______ group contains the member of the halogen family.
Which one of the following statements is not correct about the trends in the properties of the elements of a group on going down in a group?
An element with the atomic number 40 is placed in the period.
Complete the following triads by inserting the missing elements.
Li, ______, K
