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प्रश्न
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
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उत्तर
The tabular arrangement of elements in horizontal rows and vertical columns periodic table.
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संबंधित प्रश्न
What is meant by a group, in a periodic table?
Which element has two shells, both of which are completely filled with electrons?
How does number of (i) valence electrons (ii) valency; vary on moving from left to right in the second period of a periodic table?
Name an element of group 18 which can form compounds.
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
Give the chemical formula of sodium sulphite
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?
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.
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has variable valency and is a member of the Oxygen family (group 16).
Give reason for the following:
Inert gases do not form ion.
