Element Practice Atomic Number – Represents both
the number
of protons and
in an element.
electrons
Most of the mass comes from the neutron and
proton. To find the number of neutrons,
atomic weight from the atomic
subtract the
mass. 2
Atomic Symbol – a short hand way
of writing each elements name.
He
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