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प्रश्न
______ is the longest period in the periodical table.
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उत्तर
The sixth period is the longest period in the periodical table.
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संबंधित प्रश्न
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is:
(a) P
(b) Q
(c) R
(d) S
Name two elements in each case:
Transition element
Name two elements in each case:
Actinides
Give the symbol and valency of the following element and radical.
Bisulphate
p-block is composed of groups 1 and 2.
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.
Spot the error:
The elements of group 13 are called the carbon family.
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
