Download Build an Atom

Name: ___________________________________ Date _________________ Per _____
Lab3: Build An Atom PhET Lab
Introduction: Atoms are the smallest things that retain the properties of matter we can
observe. Atoms are made of three subatomic particles; protons, neutrons, and electrons.
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Protons have a relative mass of ___________ amu and a charge of ___________.
Neutrons have a relative mass of ___________ amu and a charge of ___________.
Electrons have a relative mass of nearly___________ amu and a charge of ___________.
In this simulation, you will build atoms, subatomic particle by subatomic particle and observe the
effect of adding more of each particle. When the subatomic particles in an atom change, an ion,
isotope or different element will be created.
Procedure: Play with the Sims  Chemistry  Build An Atom
Begin by playing with the simulation for a while. Become familiar with the
interface. What happens when you add protons, neutrons, or electrons? To
start over, click
.
Show the symbol, atomic mass, and charge by clicking on the
1.
2.
.
Build some atoms, and write down two examples that have a stable nucleus and neutral charge.
Include a bohr model of your atom.
Bohr Model of Atom
Electrons: _____
Name: _____________________
Protons: _____
___________________________
Neutrons: _____
Chemical Symbol: ____________
Electrons: _____
Name: _____________________
Protons: _____
___________________________
Neutrons: _____
Chemical Symbol: ____________
Electrons: _____
Name: _____________________
Protons: _____
___________________________
Neutrons: _____
Chemical Symbol: ____________
Part II: Making Ions
Not all atoms are neutral. Many have a charge. These charged atoms are called ions. Some are more positive and
some are more negative. We call the charge on such an atom the “net charge”, or “total charge”.
1.
Make a neutral Beryllium atom. What would you do to make a beryllium atom with a negative charge?
2.
Make the neutral Beryllium atom again. What would you do to make a beryllium atom with a positive charge?
Complete the table below by building some specific elements by filling in the blanks and drawing the bohr model of
that atom.
Bohr Model of the Atom
Electrons: 10
Name:
Oxygen
Protons: _____
Charge: _____
Symbol: __________
Electrons: 2
Name: _____________________
Protons: 3
Charge: _____
Symbol: __________
Electrons: _____
Name:
Fluorine
Protons: _____
F
Charge: – 1
Symbol:
Electrons: 2
Name: _____________________
Protons: _____
Symbol:
B
Charge: _____
Analysis Questions
1.
Ions are atoms of the same element with different numbers of __________________.
2.
Isotopes are atoms of the same element with different numbers of __________________.
3.
Adding or removing protons from an atom does what to the atom? _________________________________.
4.
An atom with the same number of protons and electrons has a charge of _________.
5.
Adding two electrons to a neutral atom produces an ion with a ____________ charge.
6.
An atom with six protons and five electrons would have a ______________charge.
7.
What atom is created with nine protons, nine neutrons, and nine electrons?________________
8.
Show the full symbol for the above atom (Q7) in the box at the right
9.
What does the upper-left number in the symbol represent? __________________
10. What does the lower-left number in the symbol represent? __________________
Extra Credit:The Game
Click the tab at the top that says “Game”
Call me over when you complete a level with a perfect score, and I will check it off.
Level 1 _____
Level 2 _____
Level 3 _____
Level 4 _____