Thursday, November 4, 2010

CHEMICAL ELEMENT

“Relative atomic mass” in brackets is nucleon number of most stable isotope.
ELEMENT
SYMBOLE
PROTON NO / ATOMIC NO
RELATIVE ATOMIC MASS
actinium
Ac
89
| 227 |
aluminium
Al
13
26.9815
americium
Am
95
| 243 |
antimony
Sb
51
121.75
Argon
Ar
18
39.948
arsenic
As
33
74.9216
astatine
At
85
 | 210 |
barium
Ba
56
137.34
Berkelium
Bk
97
| 247 |
beryllium
Be
4
9.0122
bismuth
Bi
83
208.98
boron
B
5
10.81
bromine
Br
35
79.904
cadmium
Cd
48
112.40
caesium
Cs
55
132.905
calcium
Ca
20
40.08
californium
Cf
98
| 251 |
carbon
C
6
12.011
ELEMENT
SYMBOLE
PROTON NO / ATOMIC NO
RELATIVE ATOMIC MASS
cerium
Ce
58
140.12
chlorine

Cl
17
35.453
chromium
Cr
24
51.996
cobalt
Co
27
58.9332
copper
Cu
29
63.546
curium
Cm
96
| 247 |
dysprosium
Dy
66
162.50
einsteinium
Es
99
| 254 |
erbium
Er
68
167.25
europium
Eu
63
151.96
fermium
Fm
100
 | 257 |
fluorine
F
9
18.9984
francium
Fr
87
| 247 |
gadolinium
Gd
64
157.25
gallium
Ga
31
69.72
germanium
Ge
32
72.59
gold
Au
79
196.967
hafnium
Hf
72
178.49
helium
He
2
4.0026
ELEMENT
SYMBOLE
PROTON NO / ATOMIC NO
RELATIVE ATOMIC MASS
holmium
Ho
67
164.930
hydrogen
H
1
1.00797
indium
In
49
114.82
iodine
I
53
126.9044
iridium
Ir
77
192.2
iron
Fe
26
55.847
krypton
Kr
36
83.80
lanthanum
La
57
138.91
lawrencium
Lr
103
| 257 |
lead
Pb
82
207.19
lithium
Li
3
6.939
lutetium
Lu
71
174.97
magnesium
Mg
12
24.305
manganese
Mn
25
54.936
mendelevium
Md
101
| 258 |
mercury
Hg
80
200.59
molybdenum
Mo
42
95.94
neodymium
Nd
60
144.24
neon
Ne
10
20.179
ELEMENT
SYMBOLE
PROTON NO / ATOMIC NO
RELATIVE ATOMIC MASS
neptunium
Np
93
| 237 |
nickel
Ni
28
58.71
niobium
Nb
41
92.906
nitrogen
N
7
14.0067
nobelium
No
102
| 255 |
osmium
Os
76
190.2
oxygen
O
8
15.9994
palladium
Pd
46
106.4
phosphorus
P
15
30.9738
platinum
Pt
78
195.09
plutonium
Pu
94
| 244 |
polonium
Po
84
| 209 |
potassium
K
19
 39.102
praseodymium
Pr
59
140.907
promethium
Pm
61
| 145 |
protactinium
Pa
91
| 231 |
radium
Ra
88
| 226 |
radon
Rn
86
| 222 |
rhenium
Re
75
186.20
ELEMENT
SYMBOLE
PROTON NO / ATOMIC NO
RELATIVE ATOMIC MASS
rhodium
Rh
45
102.905
rubidium
Rb
37
85.47
ruthenium
Ru
44
101.07
samarium
Sm
62
150.35
scandium
Sc
21
44.956
selenium
Se
34
78.96
silicon
Si
14
28.086
silver
Ag
47
107.868
sodium
Na
11
22.9898
strontium
Sr
38
87.62
sulphur
S
16
32.064
tantalum
Ta
73
180.948
technetium
Tc
43
| 97 |
tellurium
Te
52
127.60
terbium
Tb
65
158.924
thallium
Tl
81
204.73
thorium
Th
90
232.038
thulium
Tm
69
168.934
tin
Sn
50
118.69
ELEMENT
SYMBOLE
PROTON NO / ATOMIC NO
RELATIVE ATOMIC MASS
titanium
Ti
22
47.90
tungsten
W
74
183.85
uranium
U
92
283.03
vanadium
V
23
50.942
Wolfram (tungsten)
W
74
183.85
xenon
Xe
54
131.30
ytterbium
Yb
70
173.04
yttrium
Y
39
88.905
zinc
Zn
30
65.37
zirconium
Zr
40
91.22

Monday, November 1, 2010

AMAZING FACTS, ANIMALS FACTS

AMAZING FACTS

A mango trees can live and bear fruit up to 300 years.

Chocolate does not cause pimples and tooth decays.

An ostrich’s eyes are bigger than its brains.

The number of moles on our body increases through exposure to sunlight.

Rubber is used to make bubble gum.

Watermelon is not fruit but a vegetable from the cucumber family.

Drivers kill more deer than hunter.

The word Mrs, Is always an abbreviation, you can never write the full word.

One out put of 20 people has an extra rib.

When you walk down a steed hill, the pressure on you knees is equal to three
times you body weight.

A kangaroo can not jump if its tail is off the ground.

In ancient china people committed suicide by eating a pound of salts.

All polar bears are left¬-handed.

A duck’s quack does not echo, and no one knows why.

On average people fear spiders more than do death.

On average 100 people choke to death on ballpoint pens every year.

Donkeys kill more people annually than plane crashes.

The word "racecar", "kayak", and "radar" are the same
whether they are read left to right or right to left.
"a man a plan a canal panama"
spelled backwards is still
"a man a plan a canal panama
The grizzly bear can run as fast as the average horse.

The female lion does more than 90% of the hunting while the male simply
prefers to rest.

A jellyfish is 95 percent water.

At birth, a panda is smaller than a mouse and weighs about four ounces.

Fingernails grow nearly 4 times faster than toenails.

You blink over 10,000,000 times a year.

Of all the words in the English language, the word ' set ' has the most
definitions.

The sun is 330,330 times larger than the earth.

Dogs and cats, like humans, are either right or left handed... or is that
paws?.

A giraffe can clean its ears with its 21-inch tongue.

A crocodile cannot stick its tongue out.

A cat's jaws cannot move sideways.

More people are killed annually by donkeys than die in air crashes.

"Go." is the shortest complete sentence in the English language.

The vocabulary of the average person consists of 5,000 to 6,000 words.

No word in the English language rhymes with "month".

The average person laughs about 15 times a day.

The average person walks the equivalent of twice around the world in a
lifetime.

Ants don't sleep.

Lightning strikes about 6,000 times per minute on this planet.

A chameleon's tongue is twice the length of its body.

A chimpanzee can learn to recognize itself in a mirror, but monkeys can't.

A rat can last longer without water than a camel can.

About 10% of the world's population is left-handed.

A typical bed usually houses over 6 billion dust mites.

A person afflicted with hexadectylism has six fingers or six toes on one or
both hands and feet.

A woodpecker can peck twenty times a second.

A zebra is white with black stripes.

Porpoises and dolphins communicate with each other by squeaking, growling, moaning, and whistling. Porpoises and dolphins are mammals. There are about 40 species or kinds of porpoises and dolphins. Most porpoises and dolphins navigate by using "echolocation". The largest member of the dolphin family is called an orca or killer whale.

The hippopotamus gives birth under water and nurses its young in the river

as well, though the young hippos do come up periodically for air.

A cow gives nearly 200,000 glasses of milk in her lifetime.

The world's largest rodent is the Capybara. An Amazon water hog that looks
like a guinea pig, it can weigh more than 100 pounds.

The world's smallest mammal is the bumblebee bat of Thailand, weighing less than a penny.

How the wind blows. As the sun warms the earth’s surface, the atmosphere warms too. Some parts of the earth receive direct rays from the sun all year and are always warm. Other places receive indirect rays, so the climate is colder. Warm air, which weighs less than cool air, rises. Then cool air moves in and replaces the rising warm air. This movement of air is what makes the wind blow.

Dolphins sleep with one eye open.

Why do we might feel warmer wearing a dark-colored jacket than a light-colored one? . Dark colors absorb light energy. Light colors and white reflect light energy. When light shines on your dark jacket, the jacket fabric absorbs light energy. The absorbed light energy causes electrons in the atoms of the jacket to vibrate. This activity releases heat energy, which makes the jacket—and you—warmer. That's why we like to wear more dark colors in winter and more light colors in summer.

While sleeping, one man in eight snores, and one in ten grinds his teeth.


At 188 decibels, the whistle of the blue whale is the loudest sound produced
by any animal.

A flute made of bone is the oldest playable musical instrument in the world. It’s a flute carved from a bird’s wing bone more than 9,000 years ago. The flute was discovered with other flutes at an ancient burial site in China.

The fastest dog, the greyhound, can reach speeds of upto 41.7 miles per hour. The breed was known to exist in ancient Egypt 6,000 years ago.

Glue dates back to prehistoric times. Artists once mixed colorings with raw eggs, dried blood, and plant juices to make sticky paints for cave murals. Later, ancient Egyptians and other people learned to make stronger glues by boiling animal bones and hides. Today companies make glues using synthetic substances.

A cat sees about six times better than a human at night because of the tapetum lucidum , a layer of extra reflecting cells which absorb light.

A cat uses whiskers to determine if a space is too small to squeeze through. The whiskers act as antennae, helping the animal to judge the precise width of any passage.

A cat will clean itself with paw and tongue after a dangerous experience or when it has fought with another cat. This is an attempt by the animal to soothe its nerves by doing something natural and instinctive.




(Courtesy Dawn )