Match each word to the sentence where it best fits.
|atom|| ||atomic number|
|electron|| ||elementary charge|
|isotopes|| ||mass number|
- Atoms that have six protons and six neutrons or six protons and seven neutrons are both _______ of carbon.
- The nuclear particle with zero charge is the _______.
- The _______ is the lightest of the three elementary particles forming an atom.
- Oxygen-16 has eight protons and eight neutrons in its _______.
- An atom’s _______ is usually represented by Z.
- A/An _______ is the smallest particle of an element that can exist in isolation.
- The proton and the electron both carry the same _______ but with opposite signs.
- An atom that has three protons and four neutrons has a/an _______ of seven.
|Bohr model|| ||Pauli exclusion principle|
|absorption|| ||continuum spectrum|
|electron volt (eV)|| ||emission|
|energy levels|| ||excited state|
|ground state|| ||line spectrum|
|quantized|| ||quantum number|
|scattering|| ||spectral line|
- The wavelengths of the Balmer emission lines of hydrogen were successfully explained by the _______.
- In the Bohr model of the hydrogen atom, electrons can only occupy a quantized _______.
- The n = 1 energy level is called the _______.
- _______ is the process in which an atom gains energy from a photon of light.
- Many physical quantities at the atomic level can only take _______ values.
- A/An _______ is an instrument that can be used to disperse light to study its emission lines.
- One particular energy level transition in an atom corresponds to one particular wavelength of light called a/an _______.
- Light from one direction that is absorbed by atoms and re-emitted in other directions is called _______.
- After illumination by a light source, a material may emit light in other directions through a process called _______.
- The energy level of an electron is described by its integer _______.
- An incandescent light bulb generally does not emit light at distinct wavelengths but rather as a/an _______.
- Although the SI unit of energy is the joule, the _______ is a more natural unit for calculating atomic energy levels.
- When an electron in an excited state loses energy by producing a photon, this is called _______.
- No two electrons can occupy the same orbit according to the _______.
- A pattern of distinct emission or absorption wavelength features for an atom is an example of its _______.
- An atom emits or absorbs light when its electron changes between two _______.
|laser|| ||spontaneous emission|
|stimulated emission|| ||uncertainty principle|
|wave function|| |
- The probability of finding a particle at a particular location and at a particular time is determined from its _______.
- It is impossible to know simultaneously both the momentum and position of an electron because of the _______.
- A scientific instrument that produces a beam of coherent light is called a/an _______.
- A laser pointer works using the phenomenon of _______.