UNIT 14. ACTIVITY SHEET 1) Look at the ammonia molecule and

UNIT 14. ACTIVITY SHEET
1) Look at the ammonia molecule and answer these questions:
a. How many elements are in the molecule? Which are their names?
b. How many atoms are in the molecule?
2) Look for the symbol and the English name of these chemical
elements:
a.
b.
c.
d.
e.
f.
g.
h.
Calcio.
Plomo.
Cadmio.
Mercurio.
Hierro.
Silicio.
Azufre.
Fósforo.
3) How many atoms are there in these compounds?
a.
b.
c.
d.
Sulfuro de cobre SO4Cu
Carbonato cálcico CO3 Ca
Glucosa C6 H12 O6
Óxido de hierro Fe2 O3
4) Complete this chart:
5) Are these statements true or false?
a.
b.
c.
d.
e.
f.
Atoms of gold are the same as atoms of oxygen.
Compounds are formed by two or more elements.
The element carbon is representated with the symbol C.
The element silicon is representated with the symbol S.
Protons have a negative electric charge.
Neutrons are in the orbit of an atom.
6) Draw an atom which has: nine protons, nine electrons, and ten neutrons. Look
for the name of this element in the periodic chart.
7) What is the atomic number of an element?