Download Gr 9 Atomic Structure_Gizmo Element Builder - OISE

Name: __________
Period_____
1. Go to www.explorelearning.com
2. Click
near the top of the page.
3. Enter Class Code: 8CDSUB7B3G
4. Select
I need to create an ExploreLearning account, Register Now to Enroll
5. Enter your information in the following screen:
>Your username should be in this format:
Firstname.Last Initial_JCI
So John Smith,would be John.S_JCI
>Use your student number as your password
6. Click Launch Gizmo under the “Element Builder” Gizmo.
Welcome to the Element Builder Gizmo!
Instructions
Before starting, be sure to checkmark each of the boxes on the side as shown (including “Show
Element Name”, “Show Element Symbol” and “Element Notation”, as well as “Show Group and
Period”.)
You can use the and
arrows to add and remove protons, neutrons and electrons from
the atom that you may be building.
When finished building hit the
start fresh.
to see the atom in action. You can use the
to reset and
Exercises
1. Build an atom that has 1 Proton and 1 Electron.
What is the name of the atom that you have built? ________________________
2. Continue adding electrons to the atom above until you have used up all the electrons.
How many electrons are in each of the first, second and third orbit (you may want to use
to make it easier to count).
1st orbit? _________
2nd orbit? ________
3rd orbit?_________
3. Build an atom that has 3 protons, 4 neutrons and 3 electrons.
What is the name of the atom you have built? _______________
What is the Standard Atomic Notation for the atom you built? ______________
Add one more proton, what happens to the atom? ________________________________
4. Complete the following:
The number of protons in an atom determines the ______________ (identity, mass, charge) of
the atom.
The number of protons in an atom is always the same as the ______________ (atomic, mass,
charge) number of the atom.
5. An atom has 13 protons, a mass number of 27, and 13 electrons. Build the atom using the
Element Builder.
The atom I built has ______ protons, _______ neutrons and ________ electrons, and has the
following Standard Atomic Notation ______.
How many electrons are in each of the orbits?
_____ in the 1st orbit
_____ in the 2nd orbit
_____ in the 3rd orbit.
Draw a Bohr-Rutherford diagram of the atom you built showing protons and neutrons in the
nucleus and the electrons in each energy level:
6. An atom has a mass number of 31, an atomic number of 15, and has 15 electrons.
Build the atom using the Element Builder.
The atom I built has ______ protons, _______ neutrons and ________
electrons, and has the following Standard Atomic Notation ______.
Draw a Bohr-Rutherford diagram of the atom you built showing
protons and neutrons in the nucleus and the electrons in each energy
level:
7. Build an atom with 9 protons, 10 neutrons and 9 electrons.
What is the name of the atom? _________
Draw a Bohr-Rutherford diagram of the atom you built showing protons and neutrons in the
nucleus and the electrons in each energy level:
How many electrons are in the outer shell (also known as the valence shell)? _____
How many more electrons are needed for the outer shell to be complete? ______
8. Add the necessary electrons for the outer shell to be complete.
What is the standard atomic notation of the atom formed now? _____
The -1 charge on the atom indicates that the atom ________ (gained, lost) 1 electron.
Draw a Bohr-Rutherford diagram of the charged atom you built showing protons and neutrons
in the nucleus and the electrons in each energy level:
Charged Atoms become Ions.
We have noted before that the outer shell of an atom has a special name, the valence shell. We
also now that each orbital has a maximum number of electrons that it can accommodate. Most
atoms prefer to have an outer shell/valence shell that is either full with the maximum number
of electrons, or otherwise completely empty. To achieve this atoms give electrons away or take
electrons from other atoms. Ions are atoms that have become charged by gaining or losing one
or more electrons in order to achieve a full/stable valence shell.
9. The Sulphur atom has 16 of each of protons, neutrons and electrons.
How many electrons are in the valence shell of sulphur? _____
How many more electrons does sulphur need to have a full valence shell? ______
Draw the Bohr-Rutherford diagrams of 1) the stable sulfur atom and 2) the sulfur ion, showing
protons and neutrons in the nucleus and the electrons in each energy level:
The Sulfur Atom:
The Sulfur Ion:
10) An atom of Magnesium has 12 of each of protons,neutrons and electrons.
How many electrons are in the valence shell of Magnesium? _____
Would it be easier for Magnesium to gain or loose electrons in order to achieve a stable valance
shell?
Magnesium would need to _____ (gain, lose) a total of ____ electrons in order to achieve a
stable valence shell and this would form a Magnesium ion with a _____ charge.
Draw the Bohr-Rutherford diagrams of 1) the stable magensium atom and 2) the magnesium
ion, showing protons and neutrons in the nucleus and the electrons in each energy level:
The Magnesium Atom:
The Magnesium Ion:
Can you think of another atom that we have examined so far that could take on the 2 electrons
that Magnesium is giving up?
______________________________________________________________________________
11) Build an atom with 8 protons, and neutrons as well as 8 electrons.
Which atom is it? _____
How many electrons are in the valence shell? _____
For this atom to become an ion it would ________(gain, lose) another _____ electrons.
Can you name another atom we have examined that behaved in a similar way? _______
Draw the Bohr-Rutherford diagram of the Ion of this Atom showing protons and neutrons in the
nucleus and the electrons in each energy level:
Test Your Knowledge and Understanding
1. The atomic number of lithium is 3. How many neutrons does an atom of lithium have if it is
represented by the symbol shown below?
7Li
A. 2 neutrons
B. 13 neutrons
C. 4 neutrons
D. 7 neutrons
2. The atomic number of carbon is 6. How many electrons does an atom of carbon have if it is
represented by the symbol shown below?
12C1−
A. 5 electrons
B. 6 electrons
C. 7 electrons
D. 11 electrons
3. An atom of iron has an 26 protons, 30 neutrons, and 23 electrons. What are its atomic number,
atomic mass, and net charge?
A. atomic number = 26, atomic mass = 56, net charge = 3+
B. atomic number = 26, atomic mass = 56, net charge = 3−
C. atomic number = 30, atomic mass = 56, net charge = 3+
D. atomic number = 56, atomic mass = 26, net charge = 3−
Complete the table for the first 20 elements:
Atomic
Total
Name
Number
1
2
3
4
5
6
7
8
9
10
11
12
Electrons
Electrons
in
Electrons
in
Electrons
in
Electrons
in
1st Orbit
2nd Orbit
3rd Orbit
4th Orbit
Valence
Electrons
How
many
electrons
to gain or
lose?
Charge
on
Resulting
ION.
13
14
15
16
17
18
19
20