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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
State whether the following statement is true or false:
On going down in a group of the periodic table, the number of valence electrons increases.
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
Name two elements in Alkaline earth metals.
Write a short note.
Structure of the modern periodic table.
Give the symbol and valency of the following element and radical.
Bisulphate
Give the chemical formula of calcium phosphate
Right or wrong sentence.
To the left of the zig-zag line in the periodic table are the metal elements.
“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
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?
