Advertisements
Advertisements
प्रश्न
What is meant by a group, in a periodic table?
उत्तर
A group is a vertical column of elements in a periodic table.
APPEARS IN
संबंधित प्रश्न
Would you place the two isotopes of chlorine, CI-35 and CI-37 in different slots because of their different atomic masses or in the same slot because their chemical properties are the same? Justify your answer.
Which of the following statement is correct in regard to the classification of elements?
(a) Elements in modern periodic table are arranged on the basis of increasing atomic masses.
(b) Elements in Mendeleev's periodic table are arranged on the basis of increasing atomic numbers.
(c) In modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass.
(d) In modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.
What is the usual number of valence electrons in the atoms of the last element in a period?
From the standpoint of atomic structure, what determines which element will be the first and which the last in a period the periodic table?
Write a short note.
Structure of the modern periodic table.
An element A has 2 electrons in its fourth shell. State its electronic configuration.
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
In the modern periodic table, elements are arranged according to their ______
“Hydrogen occupies a unique position in Modern Periodic Table”. Justify the statement.
Explain the position of hydrogen in the periodic table.
