Atoms and Molecules- PREPERATION & REVIEW QUESTIONS
1. Name three elements which surround us in our daily lives
2. Name three elements and are solid, two that are liquid and three that are gaseous at room
temperature.
3. What is the 4th “state” that an atom can exist as?
4. What makes up the nucleus of an atom?
5. What is the 3rd part of an atom that is not in the nucleus?
6. What is an element?
7. What do we call a group or arrangement of atoms?
8. How many protons does 1 atom of hydrogen have?
9. Draw a diagram of a hydrogen atom.
10. How many protons, neutrons and electrons are there in an atom of oxygen?
11. What can you say about the characteristic properties of atoms and molecules?
12. What is the difference between an atom and a molecule?
13. In a chemical formula, what does the subscript number tell you?
14. What does the absence of any subscript number in a chemical formula mean?
15. What is the chemical formula for water?
16. What is the chemical formula for the following elements:
a) Hydrogen
b) Carbon
c) Oxygen
d)Fluorine
e) Sulphur
f) Calcium
g) Iron
h) Copper
i) Zinc
j) Lead
k) Nitrogen
l) Sodium
m) Potassium
n) Mercury
o) Gold
17. An atom always keeps its characteristic properties except when it is part of a molecule.
True or False
18. What do we call the “pathways” the electrons follow around the nucleus?
19. True or False: We can observe an atom using only the naked eye?
20. In the chemical formula C6H12O6 how many atoms of carbon are there? hydrogen?
oxygen? and in the whole molecule?
21. Between an atom and a cell, which is smaller?
22. Find which of the atoms does not belong in each of the following groups:
a) S
N
Mg
Na
H
O2
C
b) Fe
Cu
Au
H
c) O
N
S
He
d) H2O Pb CO2
NaCl
e) Au Hg
Cu
K
23. What is the main element found in our bones?
24. What are the four principle elements that make up all living things?
25. What is the unit used for the mass of the parts of an atom? What is the mass of a proton,
an electron and a neutron?