7.1-7.2: Atomic and Nuclear Physics

Glowing hot __ bodies produce emission spectra

diffuse

Stars, like the Sun, produce ___ spectra

absorption

In order for the photoelectric effect to occur, the __ beam had to have sufficiently high energy to knock electrons off atoms.

photon

The dark lines in an absorption spectrum occur because of electrons___

moving up

Are electrons allowed to orbit atomic nuclei with any random amount of energy?

No

A "nucleon”may be a proton or an ___.

neutron

The atomic number of an atom is its total number of ____

protons

The ___ number of an atom determines its elemental identity

atomic number

Different isotopes of an atom contain the same number of protons, but different number of ___

neutrons

Alpha particles are actually high energy ___ nuclei.

helium

Can beta particles be positrons?

Yes!

In beta-minus decay, the daughter nucleus has an atomic number one higher than the parent nucleus.