Paper 1 Atomic Structure Drills

Q1

Rutherford alpha scattering showed that positive charge in the atom is

A. spread uniformly through the atom.
B. concentrated in a small nucleus.
C. outside the atom only.
D. zero.

Q2

Most alpha particles passed straight through gold foil because the atom is mostly

A. solid matter.
B. empty space.
C. neutrons only.
D. electrons packed tightly.

Q3

Large-angle alpha scattering implies a nucleus that is

A. small, massive and positively charged.
B. large and negative.
C. diffuse and neutral.
D. made of photons only.

Q4

An emission line is produced when an electron

A. moves to a lower energy level.
B. moves to a higher energy level by absorbing photon.
C. leaves nucleus by alpha decay.
D. stops existing.

Q5

An absorption line is produced when an atom absorbs a photon whose energy

A. matches an allowed level difference.
B. is any value.
C. is zero.
D. is less than all differences.

Q6

Ionisation energy is the energy required to move an electron

A. to the ground state.
B. from a bound state to zero energy/free state.
C. between two lower states only.
D. into the nucleus.

Q7

Atomic energy levels are usually drawn with zero energy at

A. the ground state.
B. infinity/free electron.
C. the nucleus centre always.
D. negative infinity.

Q8

Bound atomic energy levels are usually

A. positive.
B. negative relative to zero at infinity.
C. zero only.
D. infinite.

Q9

Photon wavelength for a transition is found using

A. $hc/\lambda =\Delta E$.
B. $h\lambda =\Delta E$.
C. $\lambda =\Delta E/hc$.
D. $c=h\lambda \Delta E$.

Q10

A larger transition energy gives

A. shorter wavelength.
B. longer wavelength.
C. same wavelength always.
D. zero frequency.

Q11

Line spectra are evidence for

A. continuous atomic energies.
B. quantised energy levels.
C. random chemical energies only.
D. nuclear fission only.

Q12

The nucleus contains

A. electrons and photons only.
B. alpha particles only.
C. protons and neutrons.
D. empty space only.

Q13

Isotopes have the same

A. proton number but different nucleon number.
B. nucleon number but different proton number.
C. charge and mass always identical.
D. number of neutrons only.

Q14

Specific charge is

A. mass per unit charge.
B. charge per unit mass.
C. charge times mass.
D. energy per unit charge.

Q15

In Rutherford scattering, alpha particles are repelled because both alpha and nucleus are

A. positive.
B. negative.
C. neutral.
D. photons.

Q16

A dark absorption line in a continuous spectrum occurs at wavelengths that are

A. absorbed by atoms then re-emitted in all directions.
B. never interacting.
C. created by nuclei only.
D. longer than all visible wavelengths only.

Q17

If an electron moves from $-5.0\mathrm{eV}$ to $-2.0\mathrm{eV}$, it must

A. emit $3.0\mathrm{eV}$.
B. absorb $7.0\mathrm{eV}$.
C. emit $7.0\mathrm{eV}$.
D. absorb $3.0\mathrm{eV}$.

Q18

If an electron moves from $-1.5\mathrm{eV}$ to $-4.0\mathrm{eV}$, it

A. emits $2.5\mathrm{eV}$.
B. absorbs $2.5\mathrm{eV}$.
C. emits $5.5\mathrm{eV}$.
D. absorbs $5.5\mathrm{eV}$.

Q19

The number of possible spectral lines from several excited levels depends on

A. possible transitions between pairs of levels.
B. only the lowest level.
C. nucleus diameter only.
D. gas pressure only.

Q20

Rutherford model alone could not fully explain

A. large-angle scattering.
B. discrete stable atomic spectra.
C. nuclear concentration.
D. empty space.