Rahul Chandran R S is teaching live on Unacademy Plus
CHEMISTRY DEGREE LEVEL EXPECTED QUESTIONS
Father of Chemistry Robert Boyle Father of Modern Chemistry- Antoine Lavoisier Scientist who is known as Father of Sodapop-Joseph Priestly International Year of Chemistry was celebrated in 2011
Y"The Matter is made up of small particles called atoms. Who proposed this atomic theory? John Dalton The term 'atom' was coined by Ostwald. The centre of an atom is known as Nucleus The Concept of nucleus was proposed by Ernest Rutherford V Proton was discovered by Ernest Rutherford
Neutron was discovered by James Chadwick VElectro n was discovered by J J Thomson The Moving path of an electron around the nucleus is known as Orbit The charge of the nucleus is Positive Fundamental Particles found inside the nucleus of an atom Protons & Neutrons
The charge of proton is Positive VChargeless particles found inside the nucleus of an atom -Neutrons YNegatively charged particles found in an atom -Electrons Particle which is known as positively charged electrons Positrons who predicted the existence of positrons? Paul Dirac The scientist who discovered positron - Carl David Anderson
Total number of protons in an atom is known as Atomic Number The sum of the number of protons and neutrons in an atom is known as Mass number Who proved the existence of nucleus through alpha scattering experiment? Ernest Rutherford Who determined the charge of electron through oil drop experiment? Robert Millikan
Elements having same atomic number but different mass numbers are known as Isotopes Elements having same mass number but different atomic numbers are known as Isobars Elements having same number of neutrons are known as Isotones Plum pudding model for the atom was proposed by J J Thomson Solar system model to explain the structure of atom was proposed by Ernest Rutherford.
The atom model proposed by Neils Bohr is known as Bohr model Dual nature of electron was proposed by De Broglie. The atom without neutron in its nucleus-Hydrogen vIn an atom the number of protons is equal to Number of electrons vIsotopes of Hydrogen are Protium, Deuterium and Tritiunm Isotope was discovered by Frederick Soddy The isotope which is used to determine the age of fossils-Carbon 14
The isotope used for the treatment of cancer disease- Cobalt 60 The isotope used for the treatment of skin cancer Phosphorous 32 Molecules containing two atoms are known as Diatomic molecules The ability of an atom to donate electrons is known as Electro positivity. The ability of an atom to attract electrons to itself is known as Electro negativity
VThe periodic table was discovered by Dmitri Ivanovich Mendeleev Modern periodic table was discovered by Henry Mosely Father of Periodic Table-Mendeleev Father of Modern Periodic Table - Mosely The periodic table of Mendeleev was based on increasing order of Atomic mass The Modern periodic table is based on increasing order of Atomic number
Total number of elements in Periodic Table-118 v The number of naturally occurring elements 92 v The first artificial element - Technetium (Atomic Number-43) VThe last natural element in the periodic table -Uranium v Metals are found on left side of the periodic table Non Metals are found on right side of the periodic table. V The scientist who classified elements into Metals and Non Metals Lavoisier.
Elements which are named in the honour of women Curium, Meitnarium Group 1 elements are called Alkali Metals Group 2 elements are called Alkaline Earth Metals Group 3-12 elements in the periodic table are known as Transition elements Elements with atomic number 57-71 are known as Lanthanides Elements with atomic number 89-103 are known as Actinides
The largest atom in the periodic table Francium (Radioactive) Among non radioactive elements which is the largest atom Caesium The elements having highest electro negativity in the periodic table Fluorine The element having highest electro affinity Chlorine The element having highest density-Osmium Element having lowest density- Hydrogen
LATIN NAMES ELEMENT LATIN NAME IRON GOLD POTTASSIUM SILVER SODIUM TUNGSTEN COPPER MERCURY Ferrum (Fe) Aurum (Au) Kalium (K) Argentum (Ag) Natrium (Na) Wulfrum (W) Cuprum (Cu) Hydrargerum (Hg)