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प्रश्न
What are the elements.
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उत्तर
“Elements are pure substances made up of one kind of atoms and cannot be broken down into simpler substances.” 118 elements are there.
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संबंधित प्रश्न
Name the scientist who prepared modern periodic table.
Name two elements in each case:
Actinides
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
Give the chemical formula of calcium phosphate
State the number of elements in Period 2 of the Periodic Table.
An element which is an essential constituent of all organic compounds belongs to
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
1H2 is an isotope of hydrogen. In the modern Periodic Table it will ______.
Match the atomic number with the following:
A rare gas.
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?
