Advertisements
Advertisements
प्रश्न
Give scientific reason.
Atomic mass number is a whole number.
Advertisements
उत्तर
Atomic mass number is a whole number because it is the sum of numbers of protons and numbers of neutrons present in an atom. Which is present in the form of integers.
संबंधित प्रश्न
Na+ has completely filled K and L shells. Explain.
Which one of the following is a correct electronic configuration of sodium?
What is the maximum number of electrons which can be accommodated in the K shell of an atom?
Name the shell of an atom which can accommodate a maximum of :
(a) 2 electrons ?
(b) 18 electrons ?
Write the distribution of electrons in an atom of element whose atomic number is 18. What is special about the outermost electron shell (or valence shell) of the atom of this element?
Explain the arrangement and distribution of electrons in the various shells with reference to an atom in general and to an atom of potassium ‘3919K’ with special reference to the 2n2 rule.
The following element is given \[\ce{_18Y}\]. State the electronic configuration and state whether it is a metal, non-metal, or inert gas.
Give a reason for the following:
The shells surrounding the nucleus of an atom are also called ‘energy levels’.
For an atom ‘X’, K, L and M shells are completely filled. How many electrons will be present in it?
Which block of the periodic table contains metals, non-metals, and metalloids?
