Element Practice
2
Atomic Number – Represents both
the number of protons and
electrons in an element.
Atomic Symbol – a short hand way
of writing each elements name.
He
Most of the mass comes from the neutron and
proton. To find the number of neutrons,
subtract the atomic weight from the atomic
mass.
4
Atomic Mass – The weight of an element. .
Fill in the necessary information.
2
26
13
He
Fe
Al
4
56
27
element: ________________
element: _______________
element: _______________
# protons: _______________
# protons: ______________
# protons: ______________
# neutrons: ______________
# neutrons: _____________
# neutrons: _____________
20
10
6
Ca
Ne
C
40
20
12
element: ________________
element: _______________
element: _______________
# protons: _______________
# protons: ______________
# protons: ______________
# neutrons: ______________
# neutrons: _____________
# neutrons: _____________
9
17
11
F
Cl
Na
19
35
23
element: ________________
element: _______________
element: _______________
# protons: _______________
# protons: ______________
# protons: ______________
# neutrons: ______________
# neutrons: _____________
# neutrons: _____________
Directions: Calculate the number of neutrons and complete the Bohr model for each element.
2nd shell can fit
up to 8 more
electrons
1st shell can fit
up to 2
electrons
Element:
Helium
Element:
Neon
Element:
Nitrogen
Neutrons:
________
Neutrons:
________
Neutrons:
________
Element:
Beryllium
Element:
Oxygen
Element:
Chlorine
Neutrons:
________
Neutrons:
________
Neutrons:
________
Element:
Boron
Element:
Sodium
Element:
Fluorine
Neutrons:
________
Neutrons:
________
Neutrons:
________
3rd shell can
fit up to 18
more
electrons