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प्रश्न
Correct the statement.
Copper and zinc are representative elements.
उत्तर
Copper and zinc are transition elements.
संबंधित प्रश्न
Would you place the two isotopes of chlorine, CI-35 and CI-37 in different slots because of their different atomic masses or in the same slot because their chemical properties are the same? Justify your answer.
Give alongside is a part of the periodic table :
As we move horizontally from left to right:
| Li | Be | B | C | N | O | F | |
| Na | Mg | Al | Si | P | S | Cl |
(i) What happens to the metallic character of the elements?
(ii) What happens to the atomic size?
Helium and neon are unreactive gases. What, if anything, do their atoms have in common?
Name two elements in each case: Lanthanides
Give the symbol and valency of the following element and radical.
Calcium
Give the symbol and valency of the following element and radical.
Carbonate
“Hydrogen occupies a unique position in Modern Periodic Table”. Justify the statement.
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Write the molecular formula of the compound formed by the combination:
A and F
State the group and period, of the element having three shells with three electrons in valence shell.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
