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Question
What do you understand by orbits?
Solution
Electrons revolve around the nucleus in certain definite circular paths called orbits or shells.
RELATED QUESTIONS
How do the atomic size and metallic character of elements vary as we move :-
(a) down a group and
(b) from left to right in a period
An element which is an essential constituent of all organic compounds belongs to following group of modern periodic table:
(a) group 4
(b) group 14
(c) group 15
(d) group 16
The correct increasing order of the atomic radii of the elements oxygen, fluorine and nitrogen is:
(a) O, F, N
(b) N, F, O
(c) O, N, F
(d) F, O, N
An element X belong to 3rd periods and group II of the periodic table state:
the number of valence electrons,
Four elements P, Q, R and S belong to the third period of the Modern Periodic Table and have respectively 1, 3, 5 and 7 electrons in their outermost shells. Write the electronic configurations of Q and R and determine their valences. Write the molecular formula of the compound formed when P and S combine.
Arrange the following in order of increasing radii:
N, O, P
Formula of ion of A is A2+. Element A probably belongs to ______ group.
Element P has atomic number 19. To which group and period, does P belong? Is it a metal or a non-metal? Why?
An element A has 2 electrons in its fourth shell. State:
its valency
Name or state following with reference to the element of the first three periods of the periodic table.
The formula of the hydroxide of the element having electronic configuration 2, 8, 2.
