Chemistry
Elements 2010X & 4018Y
- Are highly reactive.
- Both have 8 electrons in 'M' shell.
- Are isotopes of the same element.
- Do not gain, lose or share electrons.
Answer
Do not gain, lose or share electrons.
Reason — Electronic configuration of X : 2, 8
Electronic configuration of Y : 2, 8, 8
Both, X and Y have 8 electrons in their outermost shell. Since, octet of both of them are complete, they are stable. So, they will neither gain, lose or share electrons.
Related Questions
Assertion: Elements 11H, 21H, 31H have different number of neutrons.
Reason: Isotopes have the same atomic number.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- A is true and R is false.
- A is false and R is true.
The element 'X' has same number of protons, neutrons & electrons, with same number of electrons in 'K' shell & 'N' shell. The element -
- Is a non-metal with valency -2.
- Attains stable octet structure of the nearest inert gas 'Ar', by gain of two electrons in its valence shell.
- Is a metal with valency +2.
- X2+ has electronic configuration 2, 8.
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.