Chemistry
Answer
An electron in the K shell has the minimum energy because the K shell is the first shell and is closest to the nucleus.
Since energy increases with increasing distance from the nucleus, the shells have increasing energy in the order:
K < L < M < N
Hence, an electron present in the K shell possesses the least or minimum energy.
Related Questions
Four elements A, B, C, D are given :
A shows the presence of 20 neutrons, 17 protons and 17 electrons.
B shows the presence of 18 neutrons, 17 protons and 17 electrons.
C shows the presence of 10 neutrons, 9 protons and 10 electrons.
D shows the presence of 4 neutrons, 3 protons and 2 electrons.
State which of the above is —
(a) an anion
(b) a cation
(c) a pair of isotopes.
Write the formula of the compound formed between D and C.
State the incorrect statement from the list given below:
- Modern atomic theory differs from Dalton's atomic theory with inference to isotopes.
- On supplying energy initially to an atom, an electron may move from K shell to L shell of the atom.
- An atom 'X' having equal no. of protons & neutrons in its atom, has electronic configuration-2, 8, 10.
- Atoms of the same element having atomic mass 39 & 41 respectively, have the same electronic configuration.
Give reasons:
Mass number is slightly less than the actual atomic mass.
Give reasons:
Noble gases are almost inert to chemical reactions.