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प्रश्न
How many groups and periods does the modern periodic table have?
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उत्तर
The modern periodic table consists of seven horizontal rows and eighteen vertical columns.
संबंधित प्रश्न
Give two example of group 17 elements.
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
Answer the following in respect of element `31/15 P`
Give its electronic configuration
The electronic configuration of an element T is 2, 8, 8, 1.
What is the group number of T?
Name the noble gas with 3 shells.
Give the symbol and valency of the following element and radical.
Hydroxide
The modern periodic table is divided into which blocks?
Write scientific reason.
There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.
Which of the following elements would lose an electron easily?
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
