Structure of Atom
Chapter 4: Structure of Atom
- The number of radial nodes in a 3p orbital is Answer: B. 1 Radial nodes =n-l-1=3-1-1=1 . 1
- The maximum number of electrons in an atom that can have \(n=3\) and \(m_s=+\frac12\) is Answer: B. 9 The n=3 shell has n²=9 orbitals, and each holds one electron with m_s=+1/2 . 1
- Identify from the following the isoelectronic species: Ne, O2-, Na+ OR Ar, Cl2-, K⊕ Atoms and ions having the same number of electrons are isoelectronic Species and No. of electrons Ne =10 O²⁻ 8 + 2 = 10 Na⁺ 11 − 1 = 10 Ar 1... 1
- Give the names of quantum numbers. The four quantum numbers are principal quantum number (n), azimuthal or subsidiary quantum number (l), magnetic quantum number (m_l), and el... 1
- State Heisenberg uncertainty principle. Heisenberg's uncertainty principle states that “It is impossible to determine simultaneously, the exact position and exact momentum (or velo... 1
- Name the element that shows simplest emission spectrum. Hydrogen shows the simplest emmission spectrum 2
- If an element ‘X’ has mass number 11 and it has 6 neutrons, then write its representation. The representation of the given element is ¹¹₅X 1
- 4. Match the following : Element No. of Neutron a. ⁴⁰₁₈AR iv. 22 b. ¹⁴₆C iii. 8 c. ⁴⁰₁₉K ii. 21 d. ¹⁴₇N i. 7 1
- Complete the following information about the isotopes in the chart given below : Substance Mass Number Number of Protons Neutrons Electrons Carbon-14 14 6 8 6 Lead-208 208 82 126 82 Chlorine-35 35 17 18 17 Uranium-238 238... 1
- Make the pairs: neutrons six electrons Answer:: ‘A’ ‘B’ a. Neutrons iv. Chadwick b. p-orbital i. six electrons c. charge on electron ii. -1.6×10⁻¹⁹ C d. Lyman series iii. Ultravio... 1
- Principal Quantum number describes a. shape of orbital b) size of the orbital 2
- “No two electrons in the same atoms can have identical set of four quantum numbers”. This statement is known as - a. Pauli’s exclusion principle 2
- p-orbitals are....... in shape. a. spherical b. dumb bell c. double dumbell d. diagonal b. dumb bell 2
- The value of Plank’s constant is - A) 6.626 × 10⁻³⁴Js 2
- The energy difference between the shells goes on ........... when moved away from the nucleus. b) decreasing 2