D425 Section 2 Chem -150 Questions with 100%
Correct Solutions
Valence shell
the outermost shell around the atom which consists of outer electrons
valence electrons
electrons in the outermost/valence shell
Core shell
the innermost shell of an atom
Core electrons
the electrons in the core shell
Octet rule
States that atoms lose, gain or share electrons in order to acquire the electron
configuration of the nearest noble gas having 8 electrons, greater stability when it has
an octet (Oxygen and fluoride want to gain electrons; Na and Mg want to lose electrons)
What group in the periodic table is an exception of the octet rule and is considered
inert?
Noble gasses (Group 18) and Helium. G18 has 8 electrons and and Helium has 2 in their
valence shell.
Inert
elements that are not reactive and generally do not form compounds with other atoms
as they are stable
Correct Solutions
Valence shell
the outermost shell around the atom which consists of outer electrons
valence electrons
electrons in the outermost/valence shell
Core shell
the innermost shell of an atom
Core electrons
the electrons in the core shell
Octet rule
States that atoms lose, gain or share electrons in order to acquire the electron
configuration of the nearest noble gas having 8 electrons, greater stability when it has
an octet (Oxygen and fluoride want to gain electrons; Na and Mg want to lose electrons)
What group in the periodic table is an exception of the octet rule and is considered
inert?
Noble gasses (Group 18) and Helium. G18 has 8 electrons and and Helium has 2 in their
valence shell.
Inert
elements that are not reactive and generally do not form compounds with other atoms
as they are stable
