A combination of atom is called……
a) atom
b) molecule
c) element
d) gas
What type of matter is made up by combining elements?
a) solid
b) compound
c) molecule
d) atom
Which of these is the correct symbol for aluminum?
a) Al
b)aL
c)AL
d) al
How many elements have been discovered so far?
a) 100
b) 118
c) 112
d) 114
