YEAR 9 SCIENCE
CHEMICAL CHANGE
ATOMIC STRUCTURE
AND THE
PERIODIC TABLE
Do not copy out the question. Answers in full sentences.
1. What is the Atomic Number of an element?
2. What is the Mass Number of an Element?
3. Name the three sub-atomic particles and explain (using a labeled
diagram) where they are found in the atom
4. What charge do each of the three sub-atomic particles carry?
5. Using the Periodic Table from the Royal Society of Chemistry at
http://www.rsc.org/periodic-table, identify the mass number and the
atomic number of the following elements:
a. Rb
b. U
c. The smallest element
d. The largest element
6. If an atom has 9 protons, 9 electrons and 10 neutrons,
a. What would it’s atomic number be?
b. What would it’s mass number be?
c. What element is this?
7. If an atom has 26 electrons, 29 neutrons, 26 protons53 protons, 74 neutrons
__________________________ 2 electrons (neutral atoms)
____________________________ 20 protons
_____________________________ 86 electrons, 125 neutrons, 82 protons
____________________________ 0 neutrons ____________
8.
9. For the first 20 elements, construct a table that lists which elements are
metals and which elements are non-metals
10.
11. Using the Periodic Table from the Royal Society of Chemistry at
http://www.rsc.org/periodic-table, complete the squares for each of
the elements on the following pages, as follows: