Содержание
- 2. QUIZ ME 1. What is Chemistry? is studies the physical properties and chemical change of matter
- 3. WHAT IS CHEMISTRY? Chemistry is the study of matter, including its composition, properties, and structure, how
- 4. The universe is composed of matter and energy. Matter is anything that occupies space and has
- 5. He O2 H2O NaCl
- 6. QUIZ ME 2. A pure substance can only be: a heterogeneous mixture an element or a
- 7. A MIXTURE is any physical material that is made up of various constituent substances, which haven't
- 8. QUIZ ME 3. Which one of the following mixture is homogeneous? starch and sugar ethanol and
- 9. INORGANIC COMPOUNDS Mineral acids Bases And Alkalis Oxides Salts
- 10. Solid the form of matter characterized by rigidity; a solid is relatively incompressible and has fixed
- 11. EXAMPLE OF PHASE CHANGES
- 13. An atom is the basic unit of a chemical element. Everything in the world is made
- 14. A chemical reaction is the change that occurs when atoms rearrange themselves and form new compounds.
- 15. TYPES OF CHEMICAL REACTIONS
- 17. QUIZ ME 4. The father of modern chemistry is: Dalton Lavoisier Mendeleeff NEXT Proust
- 18. Chemical reactions are governed by certain laws, which have become fundamental concepts in chemistry. Some of
- 19. Antoine Lavoisier (1743–1794), a French chemist, was one of the first to insist on the use
- 20. 2*200 + 32 = 2*(200+16) 432 = 432
- 21. The Proust's law of definite proportions states that a chemical compound always contains exactly the same
- 22. DALTON'S ATOMIC THEORY John Dalton (1808) used the Greek concept of an atom and the laws
- 23. An atom is the smallest unit of matter that defines the chemical elements. Every solid, liquid,
- 24. RELATIVE ATOMIC MASS OF AN ELEMENT For example, there are two main isotopes of chlorine: Number
- 26. C 12,011 ATOMIC WEIGHT Mass number = 6 protons + 6 neutrons Ar=12 Atomic number =
- 28. Hydrogen has three isotopes: 1 proton 0 neutrons 1 proton 1 neutron 1 proton 2 neutrons
- 30. CHEMICAL BOND The sharing or transfer of electrons creates some attraction force between elements that is
- 31. The amount of a substance is the mole (symbol: mol) is defined arbitrarily as the amount
- 32. Relative molecular mass (Mr) or molecular weight refers to the mass of a molecule is calculated
- 33. Even before the creation of the doctrine of atom and molecula it was found that simple
- 34. The equivalent (symbol: Eq), sometimes termed the molar equivalent, is a unit of electrical charge used
- 35. The equivalent could be also formally defined through the amount of substance which will either: react
- 37. Law of Equivalents: the mass ratio of the reacting and produced substances in the reaction is
- 38. Avogadro's Law Amedeo Avogadro introduced the term "molecule" and distinguished it from 'atom'. According to Avogadro,
- 39. BOYLE’S LAW According to Boyle’s Law when the temperature is constant, the pressure and volume of
- 40. CHARLES’ LAW According to Charles’ Law the volume of a gas is proportional to the Kelvin
- 41. GAY-LUSSAC'S LAW Gay Lussac's Law of pressure and temperature describes the direct relationship between pressure and
- 42. Partial Pressure Pressure each gas in a mixture would exert if it were the only gas
- 43. Dalton’s Law of Partial Pressures Ptotal = P′А + P′В P′В P′А V=const V=const V=const
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