topic atom & element

8/10/2019 TOPIC Atom & Element

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TOPIC: ATOMS AND ELEMENTS

What is meant by an element?

Elementare the basic units of all matter. An element cannot be broken down further

into simpler substance by any chemical or physical methods.

Note that an element:

consists of only one kind of atom,

cannot be broken down into a simpler type of matter by either physical or

chemical means, and

can exist as either atoms (e.g. helium, argon) or molecules (e.g., oxygen,

nitrogen).

A moleculeconsists of two or more atoms of the same element, or different elementsthat are chemically bound together. Note that the two oxygen atoms which comprise a

oxygen molecule move as a unit.

wo or more elements combined together chemically will form compound(e.g. water,

ammonium). wo or more elements combined physically will form mixture (e.g. sea

water, air).

How many elements had been recognized by Scientist recently?

Date :

Objective o lesson:

!upils should be able to:

" give symbols to the common elements

" understand that elements are made of atoms


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Name the li!htest t"enty elements#

he new element doesn#t have an official name yet, so scientists are calling it

ununpentium, based on the $atin and %reek words for its atomic number, &&'.

Based on table below, can you predict which the lightest element?

Atomic Mass Name chemical element Symbol Atomic number

1.0079 ydrogen H 1

4.0026 elium He 2

6.941 $ithium Li 3

9.0122 eryllium Be 4

10.811 oron B 5

12.0107 *arbon C 6

14.0067 Nitrogen N 7

15.9994 +xygen O 8

18.9984 luorine F 9

20.1797 Neon Ne 10

22.9897 -odium Na 11

24.305 agnesium Mg 12

26.9815 Aluminum Al 13

28.0855 -ilicon Si 14

30.9738 !hosphorus P 15

32.065 -ulfur S 16

35.453 *hlorine Cl 17

39.0983 !otassium K 19

39.948 Argon Ar 18

40.078 *alcium Ca 20

his is a part of /0 elements from !eriodic able.
http://www.lenntech.com/Periodic-chart-elements/H-en.htmhttp://www.lenntech.com/Periodic-chart-elements/He-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Li-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Be-en.htmhttp://www.lenntech.com/Periodic-chart-elements/B-en.htmhttp://www.lenntech.com/Periodic-chart-elements/C-en.htmhttp://www.lenntech.com/Periodic-chart-elements/N-en.htmhttp://www.lenntech.com/Periodic-chart-elements/O-en.htmhttp://www.lenntech.com/Periodic-chart-elements/F-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Ne-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Na-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Mg-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Al-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Si-en.htmhttp://www.lenntech.com/Periodic-chart-elements/P-en.htmhttp://www.lenntech.com/Periodic-chart-elements/S-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Cl-en.htmhttp://www.lenntech.com/Periodic-chart-elements/K-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Ar-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Ca-en.htmhttp://www.lenntech.com/Periodic-chart-elements/He-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Li-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Be-en.htmhttp://www.lenntech.com/Periodic-chart-elements/B-en.htmhttp://www.lenntech.com/Periodic-chart-elements/C-en.htmhttp://www.lenntech.com/Periodic-chart-elements/N-en.htmhttp://www.lenntech.com/Periodic-chart-elements/O-en.htmhttp://www.lenntech.com/Periodic-chart-elements/F-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Ne-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Na-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Mg-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Al-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Si-en.htmhttp://www.lenntech.com/Periodic-chart-elements/P-en.htmhttp://www.lenntech.com/Periodic-chart-elements/S-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Cl-en.htmhttp://www.lenntech.com/Periodic-chart-elements/K-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Ar-en.htmhttp://www.lenntech.com/Periodic-chart-elements/Ca-en.htmhttp://www.lenntech.com/Periodic-chart-elements/H-en.htm


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Do you know how Scientist arranges all these elements inside Periodic Table?

$esea%ch a &%oile o an element#

All these /0 elements had been arranged in !eriodic able. he chemical elements of

the periodic chart sorted by:

1 Name alphabetically

1Atomic number

1 -ymbol

1Atomic ass

1 2lectronegativity

1 3ensity

1 elting point

1 oiling point

1 4anderwaals radius

1 5ear of discovery

1 6nventor surname

1 2lements in earthcrust

1 2lements in human body

1 *ovalen7 radius

1 6oni7ation energy

Activity: -tudy the profile of each /0 elements and complete the table below.

http:88www.chemicool.com8

Name o

element

Atomic

mass

State o

matte%

Colo'% Meltin!

&oint ()C*

+oilin!

&oint ()C*

*click for full Periodic table http://www.webelements.com/
http://www.lenntech.com/Periodic-chart-elements/alphabetic.htmhttp://www.lenntech.com/Periodic-chart-elements/atomic-number.htmhttp://www.lenntech.com/Periodic-chart-elements/symbol.htmhttp://www.lenntech.com/Periodic-chart-elements/atomic-mass.htmhttp://www.lenntech.com/Periodic-chart-elements/electronegativity.htmhttp://www.lenntech.com/Periodic-chart-elements/density.htmhttp://www.lenntech.com/Periodic-chart-elements/melting-point.htmhttp://www.lenntech.com/Periodic-chart-elements/boiling-point.htmhttp://www.lenntech.com/Periodic-chart-elements/vanderwaals.htmhttp://www.lenntech.com/Periodic-chart-elements/discovery-year.htmhttp://www.lenntech.com/Periodic-chart-elements/inventor-surname.htmhttp://www.lenntech.com/Periodic-chart-elements/earthcrust.htmhttp://www.lenntech.com/Periodic-chart-elements/human-body.htmhttp://www.lenntech.com/Periodic-chart-elements/covalenz.htmhttp://www.lenntech.com/Periodic-chart-elements/ionization-energy.htmhttp://www.chemicool.com/http://www.webelements.com/http://www.webelements.com/http://www.lenntech.com/Periodic-chart-elements/alphabetic.htmhttp://www.lenntech.com/Periodic-chart-elements/atomic-number.htmhttp://www.lenntech.com/Periodic-chart-elements/symbol.htmhttp://www.lenntech.com/Periodic-chart-elements/atomic-mass.htmhttp://www.lenntech.com/Periodic-chart-elements/electronegativity.htmhttp://www.lenntech.com/Periodic-chart-elements/density.htmhttp://www.lenntech.com/Periodic-chart-elements/melting-point.htmhttp://www.lenntech.com/Periodic-chart-elements/boiling-point.htmhttp://www.lenntech.com/Periodic-chart-elements/vanderwaals.htmhttp://www.lenntech.com/Periodic-chart-elements/discovery-year.htmhttp://www.lenntech.com/Periodic-chart-elements/inventor-surname.htmhttp://www.lenntech.com/Periodic-chart-elements/earthcrust.htmhttp://www.lenntech.com/Periodic-chart-elements/human-body.htmhttp://www.lenntech.com/Periodic-chart-elements/covalenz.htmhttp://www.lenntech.com/Periodic-chart-elements/ionization-energy.htmhttp://www.chemicool.com/


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I,entiy some elements by thei% lame test#

ere are the procedures to do flame test (!rocedure), which is use to observe that /0

elements react with heat and produce different colour of flame.

ased on the video (4ideo), observe what happen to flame test and complete the table

below.

Name o element Colo'% o lame

Lea%n the symbols o the i%st t"enty elements#

or easily memori7ing all /0 elements, their name and symbol, let play game9

(word search) and (http:88www.funbrain.com8periodic8)

Practice make perfect !omplete the blank item below

So,i'mCalci'mO-y!enN+%.
http://var/www/apps/conversion/tmp/scratch_2/Periodic%20Table/Flame_Test_Lab.pdfhttp://var/www/apps/conversion/tmp/scratch_2/Periodic%20Table/MegaLab%20-%20Flame%20Test%20-%20Li,%20Na,%20K,%20Ca,%20Sr,%20Ba,%20Cu.mp4http://var/www/apps/conversion/tmp/scratch_2/Periodic%20Table/elementwordsearch.pdfhttp://www.funbrain.com/periodic/http://var/www/apps/conversion/tmp/scratch_2/Periodic%20Table/Flame_Test_Lab.pdfhttp://var/www/apps/conversion/tmp/scratch_2/Periodic%20Table/MegaLab%20-%20Flame%20Test%20-%20Li,%20Na,%20K,%20Ca,%20Sr,%20Ba,%20Cu.mp4http://var/www/apps/conversion/tmp/scratch_2/Periodic%20Table/elementwordsearch.pdfhttp://www.funbrain.com/periodic/


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E-&lain the o%mation o sim&le com&o'n,s#

Answer all uestions,

&. -tate the elements that present in $ithium oxide.;;;;;;;;;;;;;;;;;;;;;;;

/. *omplete the reaction below,agnesium < oxygen;;;;;;;;;;;;

=.

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