Cation anion revisi

1. Content
s
8. exerCises
2. CompetenCe standard
3. indiCators
7. important ConCept and WeBsite
9. ConCLUsion
1. titLe
4. revieW for aperCeptions
6. Cation and anion
5. speCiaL song for yoU
10. topiCs for the next meeting
Contents
Icebreaker 1, 2, 3Identity

2. The number of protons,
electrons, and neutrons of
cation and anion

Chemistry for Senior High School
Year X Semester 1

3. A.Competence Standard:
1.To realize atomic structure, element periodic
characters, and chemical bonding.
B.Base Competence:
1.1. To realize atomic structure based on
atomic theory Bohr, element characters,
relative atomic mass, and element
periodic characters in periodic table with
realize the orderliness, pass electron
configuration comprehension.

4. C.Indicators:
1.Students will be able to determine
the number of protons, electrons,
and neutrons of a cation.
2.Students will be able to determine
the number of protons, electrons,
and neutrons of an anion.

5. Basic Particles of Atom
ATOM
ELECTRON
NEUTRON
NUCLEON
PROTON

6. Atomic Number and Mass Number
Explanation:
X : Chemical symbol for element
A : Mass number, indicates the number of protons
and neutrons
Z : Atomic number, indicates the number of protons
(or electrons for a neutral atom)
X
A
Z

7. REVIEW
Complete the table below!
Atomic
Number
Mass
Number
Number of
Protons
Number of
Neutrons
Number of
Electrons
Symbol
P
31
15
15 15161531
36
31
84
70
36
31
48
39
36
31
Kr
84
36
Ga
70
31
PTE

8. Na
23
11 +e
e = 11
p = 11
n = 12
+
Na
23
11
F
19
9
-
F
19
9+e
e = 9
p = 9
n = 10
e = 10
p = 11
n = 12
e = 10
p = 9
n = 10
POSITIVE ION (CATION)
Mg
24
12
+224
12Mg+2e
e = 10
p = 12
n = 12
e = 12
p = 12
n = 12
P
31
15+3e
-331
15P
e = 15
p = 15
n = 16
e = 18
p = 15
n = 16
NEGATIVE ION (ANION)
CATION AND ANION

9. Try to get the important concept of
this material, OK?!
Notice that in the neutral atom:
the number of protons = the number of
electrons = atomic number (Z)

10. Choose A or B as the best answer to get the
important concept!
In the cation:
The number of protons =
A.atomic number (Z) B. mass number (A)
The number of electrons =
(x = charge of cation)
A.Z - x B. Z + x
The number of neutrons =
A.Z - A B. A – Z
Z
Z - x
A – Z

11. Choose A or B as the best answer to get the
important concept!
In the anion:
The number of protons =
A.atomic number (Z) B. mass number (A)
The number of electrons =
(x = charge of anion)
A.Z - x B. Z + x
The number of neutrons =
A.Z – A B. A - Z
Z
Z + x
A – Z

12. To learn more cation and anion, so you can
browse the following websites
http://www.scienceunleashed.ie/Games/Build%20an
%20atom.swf
http://www.ekimya.com/Anime/swf/Atom.swf
http://www.learner.org/interactives/periodic/swfs/ch1_atom_
identification.swf

13. EXERCISE
Complete the table below!
Ion
Atomic
Number,
Z
Number
of p of
the ion
Number
of e of
the ion
Number
of n of
the ion
Mass
number,
A
Notation
of element
N
3-
7 147 10 7
Al
3+
S
2-
Ca
2+
Br
-
13 13 10 14 27 Al
S
Ca
Br
32
40
80
16
20
45
18
18
36
16
20
35
16
20
35
N
14
7
13
27
32
16
20
40
35
80

14. CONCLUSION
“The number of protons, electrons, and
neutrons of cation and anion”
For Cation (x = charge of cation, Z = mass number,
A = atomic number)
The number of electrons =
The number of protons =
The number of neutrons =
For Anion (x = charge of anion, Z = mass number,
A = atomic number)
The number of electrons =
The number of protons =
The bumber of neutrons =
Z - x
Z
A - Z
Z + x
Z
A - Z

15. THAT’S ALL
Keep Smiling…

16. Periodic table of elements
Go to slide 8

17. ISOTOPE
ISOBAR
ISOTONE
ISOELECTRON

18. ISOTOPE
Atoms with identical atomic Atoms with identical atomic
numbers but different mass numbers but different mass
number are called number are called isotopes.isotopes.

19. Examples
12 12
CC andand
66

13 13
C C
66

20. ISOBARS
•Atoms of different elements that have Atoms of different elements that have
similar mass numbers are called similar mass numbers are called
isobars.isobars.
•Example : 14Example : 14 14 14
C and NC and N
66 77

21. Dra. SATRI FATMAWATI
SMA 1 KENDAL
isotones
•Atoms of different elements that have
similar numbers of neutrons are called
isotones.
•Example :
31 32
P and S
15 16