Chem - Unit 3

https://phm.instructure.com/courses/2055844/assignments/18864255?module_item_id=40265818

how is light generated from atoms?

light is the result of electrons moving between defined energy levels in an atom

what happens when electrons absorb energy?

it jumps up into a higher energy level and is said to be in an “excited state“

what happens when electrons emit energy?

it goes back down to a lower energy level and it’s said to be in the ground state

ionization energy

the energy required to remove an electron from a gaseous atom or ion; it indicates how strongly an atom's nucleus holds onto its electrons

atomic mass

the weighted average mass of an element's isotopes, taking into account their relative abundances. It is expressed in atomic mass units (amu)

excited state

a higher energy state of an atom or molecule, where one or more electrons have absorbed energy and moved to a higher orbital than their ground state configuration

atomic number

the number of protons in the nucleus of an atom, which defines the element and its position in the periodic table

ground state

the lowest energy state of an atom, where all electrons are in the closest orbitals to the nucleus and no electrons have been excited to higher energy levels

mass number

the total number of protons and neutrons in an atom's nucleus

isoelectronic

atoms or ions that have the same number of electrons

pseudo noble gas configuration

a stable electron configuration in which an atom has a filled inner electron shell similar to a noble gas, but with some additional electrons in the outer shell, typically seen in transition metals