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प्रश्न
The horizontal rows in a periodic table are called _____.
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उत्तर
The horizontal rows in a periodic table are called periods.
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संबंधित प्रश्न
What is the number of elements is 1st period the modern periodic table?
What are horizontal rows and vertical columns in a periodic table known as?
Name the type of elements which have outermost shell incomplete.
The electronic configuration of an element T is 2, 8, 8, 1.
What is the period number of T?
State the modern periodic law for the classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
Name an element of group 18 which can form compounds.
Right or wrong sentence.
To the left of the zig-zag line in the periodic table are the metal elements.
Complete the following flow chart.
Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.
- Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
- Determine its position in the modem periodic table.
- What is the nature of its oxide?
- Name one other element of its group.
