Atomic structure Worksheet

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Name: _______________
Class: _____________
Date: ________________
Atomic structure Worksheet
1) Shown here is a simplified representation of an atom: the smallest division of matter
that may be isolated through physical or chemical methods.
Label the 3 types of elementary particles shown on this diagram
2) Different types of atoms are distinguished by different numbers of elementary particles
within them. How many electrons, neutrons and protons make up one atom of each of
the elements below?

Carbon

Hydrogen

Helium

Aluminum
Hint: look up each of these elements on a periodic table.
3) Of the three types of subatomic particles, determine which type(s) influence the
following properties of an element?

The atomic number of the element

The mass of the atom

The electrical charge of the atom
4) Some of the particles comprising atoms react to each other in a way that scientists
categorize as electric charge. There are two fundamental types of electric charge:
positive and negative. Identify the respective charges of the following particles:
a) Electrons
b) Protons
c) Neutrons
5) What would happen if you placed two electrons near each other in free space? Would
they repel each other or attract each other? How about two protons? How about an
electron and a proton? How about a neutron and a proton?
6) Draw Bohr models of 1 atom of each of the following atoms.
a) Hydrogen
b) Lithium
c) Boron
d) carbon
e) Sodium
f) Neon
g) Helium
h) Nitrogen
i) Chlorine
j) Magnesium
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