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प्रश्न
What is the general name of the last elements of the Periodic Table?
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उत्तर
General name of the last elements of the Periodic Table is Inert Gases.
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संबंधित प्रश्न
The modern periodic table was prepared by ______.
Consider the following elements:
Ca, Cl, Na, I, Li, Ba, Sr, K, Br
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
Define:
Periodic table
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
In the modern periodic table, elements are arranged according to their ______
The three elements A, B and C with similar properties have atomic masses X, Y and Z respectively. The mass of Y is approximately equal to the average mass of X and Z. What is such an arrangement of elements called as? Give one example of such a set of elements.
Compare the radii of two species X and Y. Give reasons for your answer.
- X has 12 protons and 12 electrons
- Y has 12 protons and 10 electrons
An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.
- Identify the element X
- Write the electronic configuration of X
- Write the balanced chemical equation for the thermal decomposition of ferrous sulphate crystals?
- What would be the nature (acidic/ basic) of oxides formed?
- Locate the position of the element in the Modern Periodic Table.
Name the non-metals in the first twenty elements.
Name the following metal:
A metal present in period 3, group 1 of the periodic table.
