number
of
reactants
2
3
examples
with
two
compounds
select
examples
with
three
compounds
select
first
element
K
second
element
B
Each
point
represents
a
chemical
element
or
compound
.
Click
two
different
points
and
select
elements
.
reactants
products
-
4
-
2
2
4
K
2
4
6
8
10
12
B
