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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).
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संबंधित प्रश्न
Find the neutral atom in the periodic table which has the same number of electrons as K+ and Cl−. What is this number?
Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electron shells but different number of electrons in their outermost shells. It was found that elements A and G combine to form an ionic compound. This ionic compound is added in a small amount to almost all vegetables and dishes during cooking. Oxides of elements A and B are basis in nature while those of elements E and F acidic. The oxide of element D is, however, almost neutral. Based on the above information, answer the following questions:
(a) To which group or period of the periodic table do these elements belong?
(b) What would be the nature of compound formed by a combination of elements B and F?
(c) Which two of these elements could definitely be metals?
(d) Which one of the eight elements is most likely to be found in gaseous state at room temperature?
(e) If the number of electrons in the outermost shell of elements C and G be 3 and 7 respectively, write formula of the compound formed by the combination of C and G.
Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in ______.
How did the early chemists classify elements?
Example for liquid metal is ______.
If the distance between two Cl atoms in a Cl2 molecule is 1.98Å, then the radius of the Cl atom is ______.
An element is placed in 2nd Group and 3rd Period of the Periodic Table, burns in presence of oxygen to form a basic oxide.
- Identify the element
- Write the electronic configuration
- Write the balanced equation when it burns in the presence of air
- Write a balanced equation when this oxide is dissolved in water
- Draw the electron dot structure for the formation of this oxide
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.
How are elements grouped into various families in the periodic table?
