# Elements and Atoms - Jamestown School District by malj

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```									Atoms
Is made Up of 2 Parts:
• The Nucleus:
1. Protons
2. Neutrons
• The Rings:
1. Electrons
How to Make an Atom:
Protons = Atomic #
• Protons: Look at the atomic # and
draw the number of Protons.
• Electrons: Same as Protons.
Want to keep + / - balance.
How Do you Find # of
Neutrons? :
2. Neutrons: Round
the atomic Mass to    3
the nearest whole
number (7)
3. then subtract the
atomic # from the
atomic Mass. (7-
Li
3=4)                 6.94
How to Make an Atom:
4. Electrons: Is the same
number as the Protons,
and Atomic #.
5. Place them on the Rings.
But Remember:
1st Ring = 2 E
2nd Ring = 8 E
3rd Ring = 18 E
Practice:
3        5
Li        B
6.94     10.81
More Practice:
10       20
Ne       Ca
20.18    40.08
1. What is the Atomic # of
Calcium:
A. 40.08
20
B. 20
C.19
B       Ca
D.80
40.08
2. How many protons does a
Cobalt atom have?
A. 30            27
B. 27      B     Co
C. 58.93
58.93
D. 26
3. What is the Atomic Mass of
Hydrogen?
A. 1                1
B. H        C      H
C.1.01
1.01
D.100
4. How many electrons does
Potassium have?
A. 19            19
B. 39.10    A     K
C. 40
D. 39
39.10
5. How many neutrons does
Beryllium have:
A. 4          4
B. 6      D
C. 9.01      Be
D. 5        9.01
6. How many neutrons does
Boron have?
A. 5          5
B. 10.00   C B
C. 6
D. 10.81    10.81
7. How many shells does an
atom of Nitrogen need?
A. 1              7
B. 2      B       N
C. 3
D. 4            14.01
8. How many shells does
Carbon have?
A.   6           6
B.   2   B       C
C.   3
D.   4         12.01
9. How many electrons does
Magnesium have?
A.   12           12
B.
C.
24.31
13
A    Mg
D.   14.31       24.31
10. How many shells does
Hydrogen have?
A.   1         1
B.   2     A
H
C.   3
D.   4       1.01
11. How many protons does
Silicon have?
A.   16           14
B.   28.09
D    Si
C.   15
28.09
D.   14
12. What is the atomic mass
of Aluminum?
A.   13           13
B.   27      C    Al
C.   26.98
D.   5           26.98

```
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