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प्रश्न
Write the name.
The atom having smallest atomic radius from group 1.
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उत्तर
The atom having smallest atomic radius from group 1- Hydrogen (H)
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संबंधित प्रश्न
State whether the following statement is true of false:
The elements in a group have consecutive atomic numbers.
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 is in group 2 of the periodic table What will be the formula of its chloride?
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?
An element A from group 14 of the periodic table combines with an element B from group 16.
(i) What type of chemical bond is formed?
(ii) Give the formula of the compound formed.
The elements A, B and C belong to groups 1, 14, and 17 respectively of the periodic table.
(a) Which two elements will form a covalent compound?
(b) Which two elements will form an ionic compound?
Write the names and symbols of two very reactive metals belonging to group 1 of the periodic table. Explain by drawing electronic structure, how either one of the two metals reacts with a halogen. With which name is the bond formed between these elements known and what is the class of the compound so formed known? State any four physical properties of such compounds.
An element X (atomic number 17) reacts with an element Y (atomic number 20) to form a compound.
(a) Write the position of these elements in the modern periodic table.
(b) Write the formula of the compound formed.
Justify your answer in each case.
Why was this basis of classification discarded for future classification of elements?
What is the atomic number of elements of period 3 and group 17 of the Periodic Table?
Which one of the following statements is not correct about the trends in the properties of the elements of a group on going down in a group?
The atom of an element has electronic configuration 2, 8, 7. To which of the following elements would it be chemically similar?
Which of the following is a transition element?
In which group are inert elements placed?
What type of oxide would Eka– aluminium form?
Complete the following table:
| Symbol | Atomic No | Electronic Configuration | |
| 1. | He | 2 | ______ |
| 2. | Ne | ______ | 2,8 |
| 3. | Ar | ______ | 2, 8,8 |
| 4. | Na | 11 | ______ |
Identify the following:
An element in Period 1 which can be placed in both Group 1 and Group 17 of the Periodic Table.
Justify. Element 'X' forms an oxide with the formula X2O3 which is a solid with a high melting point. ‘X’ would most likely be placed in the group of the Periodic Table as Al.
