cation anion revisi

Contents

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

The number of protons, electrons, and neutrons

of cation and anion

Chemistry for Senior High School Year X Semester 1

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.

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.

Basic Particles of Atom

ATOM

ELECTRON

NEUTRON

NUCLEON

PROTON

Atomic Number and Mass Number

Explanation:X : Chemical symbol for elementA : Mass number, indicates the number of

protons and neutronsZ : Atomic number, indicates the number of

protons (or electrons for a neutral atom)

XAZ

REVIEW Complete the table below!

Atomic Number

Mass Number

Number of Protons

Number of Neutrons

Number of Electrons Symbol

P311515 15161531

36

31

84

70

36

31

48

39

36

31

Kr8436

Ga7031

PTE

Na2311 + e

e = 11

p = 11

n = 12

Na2311

F199

F199+ e

e = 9

p = 9

n = 10

e = 10

p = 11

n = 12

e = 10

p = 9

n = 10

POSITIVE ION (CATION)Mg24

12224

12 Mg + 2ee = 10

p = 12

n = 12

e = 12

p = 12

n = 12

P3115 + 3e 331

15 Pe = 15

p = 15

n = 16

e = 18

p = 15

n = 16

NEGATIVE ION (ANION)

CATION AND ANION

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)

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

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

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

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

Massnumber,

A

Notationof element

N3- 7 147 10 7

Al3+

S2-

Ca2+

Br-

13 13 10 14 27 Al

S

Ca

Br

32

4080

16

2045

18

1836

16

2035

16

2035

N14

7

1327

3216

2040

3580

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 - xZA - Z

Z + xZ

A - Z

THAT’S ALL

Keep Smiling…

Periodic table of elements

Go to slide 8

ISOTOPE ISOBAR ISOTONE ISOELECTRON

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.

Examples

12 12 CC andand

66

13 13 C C

66

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

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