Advertisements
Advertisements
प्रश्न
Give the symbol and valency of the following element and radical.
Hydrogen
Advertisements
उत्तर
| Element/Radical | Symbol | Valency |
| Hydrogen | H | one |
APPEARS IN
संबंधित प्रश्न
The atomic particle whose number in the atoms of an element always remains the same and which forms the real basis for the modern classification of elements is:
(a) electron
(b) proton
(c) neutron
(d) meson
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
The elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond?
(i) A and D
(ii) C and D
(iii) A and B
(iv) B and C
(v) A and C
Name two elements in halogens.
What would be the correct order if Zn, Fe, Al and Cu are arranged in increasing order of reactivity?
Give the symbol and valency of the following element and radical.
Calcium
State the number of elements in Period 1 of the Periodic Table.
The groups 1 and 2 constitute the ______ block.
In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.
Compare the radii of two species X and Y. Give reasons for your answer.
- X has 12 protons and 12 electrons
- Y has 12 protons and 10 electrons
