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प्रश्न
Name the type of elements which have two outermost shell incomplete.
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उत्तर
Transition elements
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संबंधित प्रश्न
What is periodicity in properties of elements with reference to the Modern Periodic Table?
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
State how the valency of elements varies in a group of the periodic table?
Consider the following elements:
20Ca, 8O, 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be:
(i) very stable?
(ii) in group 2 of the periodic table?
(iii) in group 16 of the periodic table?
Compare Modern Periodic Law with Mendeleev's Periodic Law.
Mendeleev's periodic table : atomic mass : : Modern periodic table : _______
The modern periodic table is divided into which blocks?
Write scientific reason.
Lithium and sodium are included in the same group in periodic table.
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
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:
E and B
