Chemistry
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.
Related Questions
The nucleus of element with 2 electrons in 'K' shell & 1 electron in 'M' shell.
- is 3919X
- has 12 neutrons
- has 19 protons
- has equal no. protons & neutrons
Which of the following is correct in an element AZY.
- Number of neutrons = Z-A
- Number of protons = A
- Z = sum of protons & electrons
- A = sum of neutrons & electrons
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.
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.