Structure of Atom — practice questions
82 curated practice questions from Structure of Atom (Chemistry Class 11, CBSE) — 82 easy. Every question includes the final answer free; step-by-step worked solutions with a free account.
- Which of the following conclusions regarding the structure of atom is based on Rutherford’s a -particle scattering…
- How many neutrons are there in _ 38 ^ 88 Sr ?
- What is the maximum number of emission lines obtained when the excited electron of a H atom in n = 5 drops to the…
- Read the following statements and mark the incorrect statement.
- Splitting of spectral lines under the influence of magnetic field is called
- Few electrons have following quantum numbers, (i) n = 4, l = 1 (ii) n = 4, l = 0 (iii) n = 3, l = 2 (iv) n = 3, l = 1…
- An electron in excited hydrogen atom falls from fifth energy level to second energy level. In which of the following…
- An orbital is described with the help of a wave function. Since many wave functions are possible for an electron, there…
- Two electrons present in M shell will differ in
- What will be the uncertainty in velocity of an electron when the uncertainty in its position is 1000 Å?
- What is the electronic configuration of O 2– ion?
- Which of the following observations was not correct during Rutherford’s scattering experiment?
- What is the velocity of electron present in first Bohr orbit of hydrogen atom?
- Few statements are given regarding nodes in the orbitals. Mark the statement which is not correct.
- Match the column I with column II and mark the appropriate choice. Column I (Atom) Column II (No. of unpaired…
- The radius of hydrogen atom in ground state is 0.53 Å. What will be the radius of 3 Li 2+ in the ground state?
- According to Bohr’s theory, the angular momentum of an electron in 5 th orbit is
- Which of the properties of isotopes of an element is different?
- Describe the orbital with following quantum numbers. (i) n = 3, l = 2 (ii) n = 4, l = 3
- The region where probability density function reduces to zero is called
- The number of radial nodes and angular nodes for d -orbital can be represented as
- An element has 13 electrons in its M shell and 1 electron in N shell in ground state. Identify the element.
- A body of mass 10 g is moving with a velocity of 100 m s –1 . The wavelength associated with it is
- The third line of the Balmer series in the emission spectrum of the hydrogen atom is due to the transition from the
- If the ionisation energy of hydrogen atom is 13.6 eV, the energy required to excite it from ground state to the next…
- What are the possible values of l and m l for an atomic orbital 4 f ?
- Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize the sodium atom. What is the ionization…
- According to Bohr’s theory, the electronic energy of H-atom in Bohr’s orbit is given by
- Match the column I with column II and mark the appropriate choice. Column I Column II (A) Uncertainty of an object (i)…
- What will be the wavenumber of yellow radiation having wavelength 240 nm?
- Given below are the spectral lines for an atom of hydrogen. Mark the lines which are not correctly matched with the…
- Which of the following properties of an atom could be explained correctly by Thomson Model of an atom?
- What will be the wavelength of an electron moving with of velocity of light?
- What is the colour corresponding to the wavelength of light emitted when the electron in a hydrogen atom undergoes…
- What will be the energy of one photon of radiation whose frequency is 5 × 10 14 Hz?
- If the velocity of an electron in Bohr’s first orbit is 2.19 × 10 6 m s –1 , what will be the de Broglie wavelength…
- The 3 d -orbitals having electron density in all the three axis is
- Which of the following quantum numbers are correct for the outermost electron of sodium atom?
- How many subshells and electrons are associated with n = 4?
- Compare the energies of two radiations E 1 with wavelength 800 nm and E 2 with wavelength 400 nm.
- An electron is in one of the 3 d -orbitals. What are the possible values of n , l and m for this electron?
- What will be the mass of a particle if uncertainty in its position is 10 –8 m and velocity is 5.26 × 10 –25 m s –1 ?
- Which of the sequences given below shows the correct increasing order of energy?
- The frequency of radiation absorbed or emitted when transition occurs between two stationary states with energies E 1…
- Three elements ‘ X ’, ‘ Y’ and ‘ Z’ have atomic numbers 18, 19 and 20 respectively. How many electrons are present in…
- If the radius of first Bohr orbit is x pm, then the radius of the third orbit would be
- The radius of the stationary state which is also called Bohr radius is given by the expression r n = n 2 a 0 where the…
- Which experiment is responsible for finding out the charge on an electron?
- The ratio of charge to mass of an electron in coulombs per gram was determined by J.J. Thomson. He determined this…
- What will be the energy of a photon which corresponds to the wavelength of 0.50 Å?
- The Bohr’s energy of a stationary state of hydrogen atom is given as E_ n = -2 ^ 2 m e^ 4 n^ 2 h^ 2 . Putting the…
- The electron in Bohr’s model of hydrogen atom is pictured as revolving around the nucleus in order for it to
- An element with mass number 81 contains 31.7% more neutrons as compared to protons. Find the symbol of the atom.
- The probability density plots of 1 s and 2 s atomic orbitals are given in figures. The density of dots in a region…
- Study the orbital diagrams of two atoms ‘ X and ‘ Y ’. Which subshell will be more stable and why?
- The energy difference between the ground state of an atom and its excited state is 3 × 10 –19 J. What is the wavelength…
- How many electrons in an atom have the following quantum numbers? n = 4, m s = –1/2
- How many orbitals in total are associated with 4 th energy level?
- The angular momentum of an electron in a given stationary state can be expressed as m_ e w r=n h 2 . Based on this…
- What will be the wavenumber of radiation having wavelength 5000 Å?
- What will be the orbital angular momentum of an electron in 2 s orbital?
- Match the values of column II with column I and mark the appropriate choice. Column I Column II (A) Mass of electron…
- _________ series of lines are the only lines in hydrogen spectrum which appear in the visible region.
- The electronic states X and Y of an atom are depicted below: X : 1 s 2 2 s 2 2 p 6 3 s 1 Y : 1 s 2 2 s 2 2 p 6 3 s 2 3…
- The wavelength of an electron moving with velocity of 10 7 m s –1 is
- Two values of spin quantum numbers i.e ., +1/2 and –1/2 represent
- What will be the uncertainty in velocity of a bullet with a mass of 10 g whose position is known with ± 0.01 mm?
- Which of the following is not a correct statement regarding the energies of orbitals?
- The energy of a photon is given as 3.03 × 10 –19 J/atom. The wavelength of the photon is
- The probability of finding out an electron at a point within an atom is proportional to the
- If uncertainty principle is applied to an object of mass 1 milligram, the uncertainty value of velocity and position…
- Which one is not in agreement with Bohr’s model of the atom?
- Though the five d -orbitals are degenerate, the first four d -orbitals are similar to each other in shape whereas the…
- Fill in the blanks with appropriate words. The principal quantum number n determines the (i) and (ii) of an orbital…
- In how many elements the last electron will have the following set of quantum numbers, n = 3 and l = 1?
- Match the constants given in column I with their values given in column II and mark the appropriate choice. Column I…
- How many number of electrons are present in a particle which carries a charge of 5.5 × 10 –16 C?
- A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by…
- In the following question, a statement of assertion is followed by a statement of reason. Mark the correct choice…
- Which of the following configurations does not follow Hund’s rule of maximum multiplicity?
- What does the negative electronic energy (negative sign for all values of energy) for hydrogen atom means?
- What is the lowest value of n that allows g orbital to exist?