Transcript Elements and Atoms - Jamestown Public Schools

Atoms
Is made Up of 2 Parts:
• The Nucleus:
1. Protons
2. Neutrons
• The Rings:
1. Electrons
How to Make an Atom:
Protons = Atomic #
1. Protons: Look at the atomic # and
draw the number of Protons.
2. Electrons: Same as Protons.
Want to keep + / - balance.
How Do you Find # of
Neutrons? :
2. Neutrons: Round
the atomic Mass to
the nearest whole
number (7)
3. then subtract the
atomic # from the
atomic Mass. (73=4)
3
Li
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
Li
6.94
5
B
10.81
More Practice:
10
Ne
20.18
20
Ca
40.08
1. What is the Atomic # of
Calcium:
A. 40.08
B. 20
C.19
D.80
B
20
Ca
40.08
2. How many protons does a
Cobalt atom have?
A. 30
B. 27
C. 58.93
D. 26
B
27
Co
58.93
3. What is the Atomic Mass of
Hydrogen?
A. 1
B. H
C.1.01
D.100
C
1
H
1.01
4. How many electrons does
Potassium have?
A. 19
B. 39.10
C. 40
D. 39
A
19
K
39.10
5. How many neutrons does
Beryllium have:
A. 4
B. 6
C. 9.01
D. 5
4
D
Be
9.01
6. How many neutrons does
Boron have?
A. 5
B. 10.00
C. 6
D. 10.81
5
C B
10.81
7. How many shells does an
atom of Nitrogen need?
A. 1
B. 2
C. 3
D. 4
B
7
N
14.01
8. How many shells does
Carbon have?
A.
B.
C.
D.
6
2
3
4
B
6
C
12.01
9. How many electrons does
Magnesium have?
A.
B.
C.
D.
12
24.31
13
14.31
A
12
Mg
24.31
10. How many shells does
Hydrogen have?
A.
B.
C.
D.
1
2
3
4
1
A
H
1.01
11. How many protons does
Silicon have?
A.
B.
C.
D.
16
28.09
15
14
14
D
Si
28.09
12. What is the atomic mass
of Aluminum?
A.
B.
C.
D.
13
27
26.98
5
C
13
Al
26.98