Q. No.The basic theme of the periodic table is:
| 1. | To classify the elements in a period according to their properties. |
| 2. | To classify the elements in a group according to their ionization enthalpy. |
| 3. | To classify the elements in periods and groups according to their properties. |
| 4. | To classify the elements in periods and groups according to their lustre. |
Which of the property was used by Mendeleev to classify the elements?
| 1. | Brightness | 2. | Atomic weight |
| 3. | Number of isotopes | 4. | Lustre |
The basic difference between Mendeleev’s Periodic Law (A) and Modern Periodic Law (B) is:
| 1. | A is based on atomic weights while B is based on atomic numbers. |
| 2. | B is based on atomic weights while A is based on atomic numbers. |
| 3. | A is based on the number of isotopes while B is based on atomic numbers. |
| 4. | A is based on physical properties while B is based on chemical properties. |
How many elements are contained in the sixth period of the modern periodic table?
1. Eight (8)
2. Eighteen (18)
3. Thirty-two (32)
4. Sixteen (16)
The period and group number of the element with Z =114 are:
| 1. | 8th period and 16th group | 2. | 7th period and 14th group |
| 3. | 14th period and 7th group | 4. | 9th group and 14th period |
The atomic number of the element present in the 3rd period and 17th group of the periodic table would be:
| 1. | 18 | 2. | 23
|
| 3. | 24
|
4. | 17 |
The element named after Lawrence Berkeley Laboratory is:
1. Seaborgium
2. Lawrencium
3. Moscovium
4. Hafnium
The resemblance in physical and chemical properties within a group of the periodic table is a result of:
1. Same atomic number
2. Same number of valence electrons
3. Same atomic mass
4. Same number of isotopes
1. The distance from the nucleus to the outermost shell of an atom
2. The distance from the nucleus to the outermost shell of an ion
3. The distance from the nucleus to the outermost shell of a cation only
4. The distance from the nucleus to the outermost shell of an anion only
The trend of atomic radius in a period and a group is :
| 1. | Generally decreases from right to left across a period and increases down a group. |
| 2. | Generally increases from left to right across a period and decreases down a group. |
| 3. | Generally decreases from left to right across a period and increases down a group. |
| 4. | Generally remains same from left to right across a period and increases down a group. |
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