STRUCTURE FORMULAE.....

Structural formulas show every atom and every bond, as well as the unshared electron pairs found in a molecule. Atoms are represented by their atomic symbol. Bonds are represented by solid black lines.

JUST LIKE SOLAR SYSTEM..........

MODERN ATOMIC MODEL
By James Chadwick

SUBATOMIC :

PROTON (+)
NEUTRON (no charge)
Both located in nucleus

ELECTRON (-)
Round nucleus at certain orbit

RELATIVE MASS OF :

PROTON - 1
NEUTRON -1
ELECTRON -1/1840
almost 0

FRACTIONAL DISTILLATION

Fractional distillation is the separation of a mixture into its component parts, or fractions, such as in separating chemical compounds by their boiling point by heating them to a temperature at which several fractions of the compound will evaporate.

What is Naphthalene?

Diagram of naphthalene heating process

Melting point is the temperature where the solid become liquid.

Naphthalene (ubat gegat)

The melting point of naphthalene is 78 degree Celsius.

WHAT IS CHEMISTRY?

Chemistry is the science concerned with the composition, structure, and properties of matter, as well as the changes it undergoes during chemical reactions.

WELCOME 2011....YEAR OF EXCELLENT

Selamat datang tahun baru 2011.

selamat datang juga buat student2 saya yang baru naik form 5.

bersedialah dengan segala kelengkapan untuk pergi berperang...

sebelum itu sudi lah menerima sedikit sebanyak tunjuk ajar

sebagai bekalan dimedan perang...............SPM 2011 pasti cemerlang.

cg. Izad

ULANGKAJI - industry