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प्रश्न
What are the periods in a periodic table?
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उत्तर
“Horizontal rows from left to right in a periodic table are called periods.”
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संबंधित प्रश्न
Which of the following statement about the modern periodic table is correct?
(a) It has 18 horizontal rows known as periods.
(b) It has 7 vertical columns known as periods.
(c) It has 18 vertical columns known as groups.
(d) It has 7 horizontal rows known as groups.
In the modern Periodic Table, why does cobalt with higher atomic mass of 58.93 appear before nickel having lower atomic mass of 58.71?
Name two elements in each case:
Actinides
What is meant in the periodic table by a period?
What is the number of elements in the 3rd period, of the modern periodic table?
Give the symbol and valency of the following element and radical.
Sodium
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the chemical formula of magnesium nitrate
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 same valency as Lithium.
Spot the error:
The elements of group 13 are called the carbon family.
