Advertisements
Advertisements
प्रश्न
Identify the following:
An element in Period 1 which can be placed in both Group 1 and Group 17 of the Periodic Table.
उत्तर
Hydrogen
Explanation:
Hydrogen has an electronic configuration of 1, which allows it to take e− and complete its duplet as halogen (Group 17), as well as donate 1 e− as alkali metals (Group 1).
APPEARS IN
संबंधित प्रश्न
Why do we classify 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 X from group 2 reacts with element Y from group 16 of the periodic table.
(a) What is the formula of the compound formed?
(b) What is the nature of bond in the compound formed?
Two elements X and Y belong to group 1 and 2 respectively in the same period of periodic table. Compare them with respect to:
(i) the number of valence electrons in their atoms
(ii) their valencies
(iii) metallic character
(iv) the sizes of their atoms
(v) the formulae of their oxides
(vi) the formulae of their chlorides
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?
______ group contains the member of the halogen family.
Moseley’s periodic table is based on atomic mass.
An atom of an element has the electronic configuration 2,8,2. To which group does it belong?
Which of the following metals have low melting and boiling point?
