Periodic Table
What is the size of an electrically neutral atom of an element?
(Atomic radius)
What do noble gases have?
(Full outer shell)
__Na + __F₂ --> __NaF
(2,1,2)
low melting and boiling point
covalent
What is the atomic number of sodium? (Answer: 11)
(11)
What do ionic compounds composed of?
(cation and anions)
__Mg + __HF --> __MgF₂ + __H₂
(1,2,1,1)
EN difference of 1.67 or greater
ionic
How many moles are in 50.0g of HCI?
(1.371328 moles HCI)
How many valence electrons dose selenium have?
(6)
____ RbNO3 + ____ BeF2 → ____ Be(NO3)2 + ____ RbF
(2,1,1,2)
conduct electricity when aqueous or molten
ionic
How many moles are in 100.0g of KOH?
(1.782346 moles KOC)
What is the shape of an AB4 molecule?
(tetrahedral)
____ GaF3 + ____ Cs → ____ CsF + ____ Ga
(1,3,3,1)
when atoms that easily lose electrons react with atoms that easily gain electrons
ionic bond
How many moles K2CO3 are produced if .239 moles of KO2?
(0.1195 moles of K2CO3)
How many extra electrons are in a compound that has a 2+ superscript?
(none its missing 2 electrons)
__Al₂(SO₄)₃ + __Ca(OH)₂ --> __Al(OH)₃ + __CaSO₄
(1,3,2,3)
two or more atoms held together by covalent bonds making it neutral
molecules