How does light behave like a particle?

Who was the first scientist to measure speed as distance over time?

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom