chemical bonding review worksheet
group number: 13
# of valance electrons: 3
group number: 14
# of valance electrons: 4
group number: 15
# of valance electrons: 5
group number: 16
# of valance electrons: 6
group number: 17
# of valance electrons: 7
group number: 18
# of valance electrons: 8
how many valance electrons do elements in group 2, the alkaline earth metals, have?
2 valance electrons
how many valance electrons do most atoms need to have a complete outer shell and be happy?
8
what are valance electrons ?
electrons in the outer shell
name chemical formula: 3 hydrogen + 1 nitrogen
h3n
which two elements only need two valance electrons to be happy?
hydrogen and helium
Convalent or ionic? KCl
ionic
Convalent or ionic? KF
ionic
Convalent or ionic? MgBr2
ionic
what is the rule for finding out how many valance electrons elements in groups 13-18 have?
look at last number
Name ionic compound: Mg02
magnesium oxide
if an element gains an electron, will it form a positive ion or a negative ion?
negative ion
how many valance electrons do elements in group 1, like alkali metals, have?
one
why do the elements you named in #5 only need two valance electrons?
only have 1 orbital
Where are valance electrons found?
outermost orbital
if an element gives away an electron, will it form a positive ion or a negative ion
positive ion
Name ionic compound: k2s
potassium sulfide
name chemical formula: sodium and chlorine
sodium chloride
Name ionic compound: Na2O
sodium oxide
Which part of the atom is responsible for chemical bonding?
valence electrons
how do convalent bonds form?
when atoms share valance electrons
Name ionic compound: NaCl
Sodium chloride
name chemical formula: 1 chlorine + 1 chlorine
cl2
name chemical formula: 1 carbon + 4 oxygen
co4
Convalent or ionic? F2
convalent
Convalent or ionic? H20
convalent
Convalent or ionic? N2O4:
convalent
name chemical formula: calcium and chlorine
calcium chloride
How do ions form?
Atoms gain or lose electrons
how do ionic bonds form?
Ionic bonds form when there is a complete transfer of electrons between atoms
Why does an ion have a charge?
They would not have an equal number of charges particles
name chemical formula: aluminum and chlorine
aluminum chloride
