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प्रश्न
The electron shell ______ is nearest to the nucleus.
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उत्तर
The electron shell K is nearest to the nucleus.
संबंधित प्रश्न
Write the names of the elements present in the following compound.
Common salt
Fill in the blank
An ion with negative charge is called _______
Define: Chemical bond
Name the particles which revolve around the nucleus.
What does the word ‘atom’ mean?
How did Neils Bohr visualise the atom ?
Name the particle or particles you would expect to find in :
The orbit of an atom
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
State two observations which show that atom is not indivisible.
The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
A compound containing one atom of carbon and two atoms of oxygen is ______.
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
Define the term ions or radicals.
A change in the physical state can be brought about
The graphite refill used is pencil is made of element called ______.
______ is a substance that is made up of three oxygen atoms chemically combined.
What is the fundamental particle of an element?
The ______ are combination of atoms of various elements or the same element.
