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Assistant General Science

Chemistry – 01

സയൻസിലെ രണ്ടാമത്തെ ഭാഗമായ രസതന്ത്രത്തിലേക്ക് കടക്കുമ്പോൾ ആദ്യം ആറ്റം, ഘടകങ്ങൾ, മോഡലുകൾ, പ്രധാന ശാസ്ത്രജ്ഞന്മാർ എന്നിവയാണ് ആദ്യ പാഠത്തിൽ ഉൾക്കൊള്ളിച്ചിരിക്കുന്നത്.

  • Ancient name of Chemistry

Alchemy

 

  • Father of Chemistry

Robert Boyle

 

  • Father of Modern Chemistry

Antoine Lavoisier

 

  • International Year of Chemistry

2011

 

  • All substances are made up of tiny particles called

Atoms

 

  • Meaning of the word Atom (Greek word atomos)

Indivisible

 

  • Atom was discovered by

John Dalton

 

  • Law of multiple proportions was put forward by

John Dalton

 

  • First atomic theory was put forward by

John Dalton

 

  • The term ‘Atom’ was coined by

Ostwald

 

  • Fundamental particles of Atom

Proton, Neutron and Electron

 

  • Center of Atom that contains Protons and Neutron

Nucleus

 

  • Sub atomic particles in Nucleus (Nucleons)

Proton and Neutron

 

  • Heaviest Sub atomic particle

Neutron

 

  • Lightest Sub atomic particle

Electron

 

  • Moving particle of Atom

Electron

 

  • Antiparticle of Neutron with same mass of a Neutron

Anti-neutron

 

  • Antiparticle of Proton with same mass of a Proton

Anti-proton

 

  • Nuclear particle with the mass of an Electron but opposite charge

Positron

 

  • Electron was discovered by

JJ Thomson

 

  • Proton was discovered by

Ernest Rutherford

 

  • Nucleus was discovered by

Ernest Rutherford

 

  • Neutron was discovered by

James Chadwick

 

  • Charge of Electron

Negative

 

  • Charge of Proton

Positive

 

  • Charge of Nucleus

Positive

 

  • Charge of Neutron

No Charge

 

  • Chemical property of a substance is determined by

Electrons

 

  • Number of Protons present in the nucleus of an Atom

Atomic Number (Z)

 

  • Total number of Protons and Neutrons present in the nucleus of an Atom

Mass Number (A)

 

  • An atom is bigger than its Nucleus

105 times

 

  • Circular path in which electrons move around is called

Orbit

 

  • The orbit followed by moving electrons around Nucleus of an Atom is called

Shell

 

  • Maximum number of electrons in a shell is

2n2 (n- Number of Shell)

 

  • The first model of atom was put forwarded by

Neils Bohr

 

  • The most acceptable model of atom

Bohr’s Model

 

  • Planetary model or Nuclear model of atom was put forwarded by

Rutherford

 

  • Plum pudding, Molecular model of atom was put forwarded by

J J Thomson

 

  • Wave mechanics model of atom was put forwarded by

Max Plank

 

  • Dual nature of Electron was put proposed by

Louis De Broglie

 

  • Uncertainty principle was put proved by

Werner Heisenberg

 

  • Atom without Nuetron

Hydrogen

 

  • Unit of measuring mass of an Atom is

Atomic Mass Unit (a.m.u)

 

  • Element used to find a.m.u

Carbon 12


(To be Continued…)