The energy of an electron in the ground state $(n=1)$ for $\mathrm{He}^{+}$ion is $-x ~J$, then that for an electron in $n=2$ state for $Be^{3+}$ ion in $J$ is
- A$-\frac{x}{9}$
- B$-4 x$
- C$-\frac{4}{9} x$
- ✓$-x$
Answer: D.
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Answer: D.
View full solution →| List $I$(Quantum Number) | List $II$(Information provided) |
| $A$. mı | $I$. Shape of orbital |
| $B$. $m_s$ | $II$. Size of orbital |
| $C$. $1$ | $III$. Orientation of orbital |
| $D$. $\mathrm{n}$ | $IV$. Orientation of spin of electron |
Choose the correct answer from the options given below :
Answer: A.
View full solution →$A$. Atoms of all elements are composed of two fundamental particles.
$B$. The mass of the electron is $9.10939 \times 10^{-31} kg$.
$C$. All the isotopes of a given element show same chemical properties:
$D$. Protons and electrons are collectively known as nucleons.
$E$. Dalton's atomic theory, regarded the atom as an ultimate particles of matter Choose the correct answer from the options given below
Answer: A.
View full solution →Answer: D.
View full solution →Answer: C.
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