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Question
Name two elements in Inert gas.
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Solution
Neon and Argon.
RELATED QUESTIONS
State modern periodic law.
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
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?
How does the electronic configuration of an atom relate to its position in the modern periodic table?
An element A has 2 electrons in its fourth shell. State its electronic configuration.
State the number of elements in Period 2 of the Periodic Table.
Write scientific reason.
Lithium and sodium are included in the same group in periodic table.
Compare the radii of two species X and Y. Give reasons for your answer.
- X has 12 protons and 12 electrons
- Y has 12 protons and 10 electrons
The maximum number of electrons that can be accommodated in s, p,d, and f subshells are ______.
