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प्रश्न
The horizontal rows in a periodic table are called _____.
उत्तर
The horizontal rows in a periodic table are called periods.
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संबंधित प्रश्न
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
What is the usual number of valence electrons and valency of group 18 elements of the periodic table?
Write a short note.
Structure of the modern periodic table.
Name and state the following with reference to the elements of the first three periods of the periodic table.
A covalent compound formed by an element in period 2 and a halogen.
Answer the following question.
Define the atomic size. Give its unit of measurement. In the modern periodic table what trend is observed in the atomic radius in a group and a period and why is it so?
Give the symbol and valency of the following element and radical.
Bisulphate
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
Write an Explanation.
Period
Which of these belong to the same period?
| Element | A | B | C |
| Atomic number | 2 | 10 | 5 |
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
