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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
Write the merits of the modern periodic table over Mendeleev’s Periodic table
Name the scientist who prepared modern periodic table.
The three elements having chemical symbols of Si, B and Ge are:
(a) all metals
(b) all non-metals
(c) all metalloids
(d) Si is metalloid, B is metal and Ge is non-metal
An element X belongs to 3rd period and group 2 of the periodic table. State:
(a) number of valence electrons
(b) valency
(c) metal or non-metal
(d) name of the element
What are horizontal rows and vertical columns in a periodic table known as?
Write the number of protons, neutrons and electronic configuration of \[\ce{_19^39K, _15^31P}\]. Also state their position in periodic table.
Which of the following statements about the Modern periodic table is correct?
Answer the following question in one sentence.
The modern periodic table is divided into which blocks?
In the modern periodic table, elements are arranged according to their ______
The inert gas which lies in the third period is ______
