Punjab Textbook Board Books Pdf
Q9: Define mixture? Ans: Mixture:-A mixture contains two or more element which can easily be separated by physical method. The component doesn’t lose its chemical properties. For example: soil; rock; etc Q10: Define valency? Ans: Valency:-The chemical combining capacity of an atom or an element with another element is called valency.
Q2) Describe the types of covalent bond? Ans: Types of covalent bonds Single covalent bond:-A covalent bond formed by the mutual sharing of one electron pair is called a covalent and is denoted by single short straight line. For example in H-Cl, H-H etc Double covalent bond:-A covalent bond formed by sharing of two electron pair is denoted by two short line. For example in O2, C2 etc Triple covalent bond:-A three electron pair bond is called a triple covalent bond and is donated by three short line. In nitrogen there is a triple covalent bond. Q3) Differentiate between ionic and covalent bond?
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Looking for the intermediate 2nd year Physics Punjab text book pdf? Here we have shared 2nd year Physics Book pdf - 12th Class Physics TextBook Download or read online. 2nd year book notes. 2nd year Physics Text Book pdf Download Maher Afrasiab 21:53. 12th notes, 12th Physics, Books, Education News, Notes. Next Prev Post. Previous Next.
3:They are usually insoluble in water. 4: They can conduct electricity. 4: They cannot conduct electricity. 5: They are non volatile in nature. 5: They are volatile in nature. Q5) What is chemical bond? Ans: Chemical bond: The attractive force which bonds atoms together is called chemical bond.
Number of Protons = 1 Number of Electrons = 1 Number of Neutrons = 0 Atomic Number = 1 Mass Number = 1 Deuterium Deuterium is called heavy hydrogen. Studio 5000 logix emulate ots. The percentage of deuterium in naturally occurring hydrogen is about 0.0015%. It has one proton and one neutron in its nucleus. It has one electron revolving around its nucleus. It is denoted by symbol D. Number of Proton = 1 Number of Electron = 1 Number of Neutrons = 1 Atomic Number = 1 Mass Number = 2 Tritium Radioactive hydrogen is called tritium. It is denoted by symbol T.
3) Nature of the solute and the solvent:-The solubility of polar compound is more in polar solvent and that of non-polar solvent in non-polar solvent. Q2) Define molarity?
The number of neutrons present in the nucleus of an atom is represented by N. Mass Number = No of Protons + No of neutrons A = Z + N Isotopes The atoms of same elements which have same atomic number but different mass number are called Isotopes. The number of protons present in the nucleus of an atom remains the same but number of neutrons may differ. Isotopes of Different Elements Isotopes of Hydrogen Hydrogen has three isotopes: 1.
Q3) Discuss bohrs atomic model &describe its significance in atomic structure? Ans: Bohrs atomic model:- Neil bohr proposed a new model for the structure of the atom in 1913.The salient features of this model are that. 1) Electron revolve around the nucleus in fixed circular paths which he called orbit or energy level. 2) As long as an electron revolve in a particular energy level it does not emit or absorb energy. 3) When an electron absorb energy it moves to a higher energy level further away from the nucleus.
Punjab Textbook Board Books
Ordinary Hydrogen or Protium, H. Heavy Hydrogen or Deuterium, D. Radioactive Hydrogen or Tritium, T. Protium Ordinary naturally occurring hydrogen contains the largest percentage of protium. It is denoted by symbol H. It has one proton in its nucleus and one electron revolve around the nucleus.