Advertisements
Advertisements
प्रश्न
Match the following
| 1. | Galvanisation | Noble gas elements |
| 2. | Calcination | Coating with Zn |
| 3. | Redox reaction | Silver-tin amalgam |
| 4. | Dental filling | Alumino thermic process |
| 5. | Group 18 elements | Heating in the absence of air |
उत्तर
| 1. | Galvanisation | Coating with Zn |
| 2. | Calcination | Heating in the absence of air |
| 3. | Redox reaction | Alumino thermic process |
| 4. | Dental filling | Silver-tin amalgam |
| 5. | Group 18 elements | Noble gas elements |
APPEARS IN
संबंधित प्रश्न
Rewrite the following statement after correction, if necessary:
Groups have elements with consecutive atomic numbers.
Rewrite the following statement after correction, if necessary:
Isotopes are the elements of the same group.
An element X is in group 2 of the periodic table What will be the formula of its chloride?
An element X is in group 2 of the periodic table what will be the formula of its oxide?
An atom has the electron structure of 2, 7.
(a) What is the atomic number of this atom?
(b) To which of the following would it be chemically similar?
7N, 15P, 17Cl, 18Ar
(c) Why would you expect it to be similar?
The following diagram shows a part of the periodic table containing first three periods in which five elements have been represented by the letters a, b, c, d and e (which are not their chemical symbols):
-
1 18 a 2 13 14 15 16 17 b c d e
(i) Select the letter which represents an alkali metal.
(ii) Select the letter which represents a nobles gas.
(iii) Select the letter which represents a halogen.
(iv) What type of bond is formed between a and e?
(v) What type of bond is formed between d and e?
What was the basis of the earliest attempts made for classification and grouping of elements?
An element X from group 2 of the Periodic Table reacts with Y from group 17 to form a compound. Give the formula of the compound.
An element with the atomic number 40 is placed in the period.
Complete the following triads by inserting the missing elements.
Li, ______, K
