أهم 100 سؤال فى مراجعة مادة الكيمياء لغات الجزء الرابع الصف الثالث ثانوي

من طرف **حنين الصمت** الأربعاء 24 أبريل 2013, 8:25 pm

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أهم 100 سؤال فى مادة الكيمياء لغات - الجزء الرابع

Find scientific term

1) A pure simple substance that cannot be changed to simpler forms by the traditional chemical methods.

2) The amount of energy absorbed or emitted when the electron jumps from one energy level to another

3) A region of space around the nucleus where the electron most probable exists

4) Electrons occupy the sublevels in the order of increasing their energy æ the lowest energy sublevels are filled first.

5) No electron pairing takes place in a given sublevel until each orbital contains one electron"

6) A stream of invisible rays is emitted from the cathode through
a discharge tube with low pressure(0.01-0.001 mmHg) and high potential
difference(10000 volts)

7) A limited number of colourless lines result from radiation of gases or vapour under reduced pressure and high temperature.

Cool

The electron is a particle an also has wave motion

9) The determination of both the velocity and the position of an electron at the same time are practically impossible.

10) The distance between the nuclei of two bonded atoms

11) Half the distance between the nuclei of two similar bonded atoms

12) Amount of energy needed to remove the most loosely bound electron from isolated gaseous atom

13) Amount of energy released when an extra electron is added to neutral gaseous atom

14) The tendency of the atom to attract the electron of the chemical bond to itself

15) Nonmetal oxide dissolves in water forming acid and reacts with base gives salt and water

16) Metal oxides dissolve in water forming alkalis and react with acids giving salt and water

17) Oxides react with acids or bases giving salt and water

18) The number of charges(+ve or –ve) the atom would have in a compound

19) The process of losing electrons leads to increase oxidation number

20) The process of gaining electrons leads to decrease oxidation number

21) Bonds are broken in reactants and new bonds are formed in products

22) Attraction force between +ve cation and –ve anion to form neutral compound

23) Sharing by one pair of electrons or more between two atoms

24) Sharing by one pair of electrons or more between two atoms similar in electronegativity

25) Sharing by one pair of electrons or more between two atoms different in electronegativity

26) By the exception of H2, Li and Be atoms of all elements tend to reach octet structure.

27) It explains covalent bond as overlapping two orbitals from the two atoms each orbital has single electron

28) Overlap two or more orbitals close in energy to form hybrid orbitals similar in energy

29) All the atomic orbitals of combined atoms are mixed forming molecular orbitals

30) A type of covalent bond where a donor atom has lone pair of electrons donates it to acceptor atom has a vacant orbital

31) Hydrogen acts as a bridge between two atoms of high electronegativity so it binds the two molecules together

32) The valence electrons of a metal forming electron cloud which decrease the repulsion between the +ve ions of the metal

33) Some atoms such as K and Cs when they are exposed to light their free electrons move forming electric current

34) Presence of an element in more than one form different in physical properties but similar in chemical ones

35) Formation of non porous layer of oxide surround the metal and stop further reaction

36) The element which found incompletely filled sublevels (d) or (f) in one of its state.

37) Attraction to the outer magnetic field due to presence of unpaired electron in(d)or(f)sublevel

38) Repulsion to the outer magnetic field due to absence of unpaired electron in(d)or(f)sublevel

39) Number of unpaired electrons in (d) or (f) sublevel

40) Treatment fine particles and powder into big particle

41) Strongly heating iron ore in the air.

42) Mixing two or more elements to get certain properties

Answer

1) Element

2) Quantum

3) Electron cloud

4) Aufbau (building-up) principle

5) Hund's rule

6) Cathode rays

7) Line spectra

Cool

Dual nature of the electron

9) Heisenberg uncertainty principle

10) Bond length

11) Atomic radius

12) Ionization energy

13) Electron affinity

14) Electronegativity

15) Acidic oxide

16) Basic oxides

17) Amphoteric oxides

18) Oxidation number

19) Oxidation

20) Reduction

21) Chemical reaction

22) Ionic bond

23) Covalent bond

24) Pure covalent bond

25) Polar covalent bond

26) Octet rule

27) Valence Bond Theory

28) Hybridization

29) Molecular Orbital Theory

30) Coordinate Bond

31) Hydrogen Bond

32) Metallic Bond

33) Photo electric phenomenon

34) Allotropy

35) Passivity

36) Transition element

37) The magnetic properties

38) The diamagnetic properties

39) Magnetic moment

40) Sintering process

41) Roasting ore

42) Alloy

Definitions

1. Mole

2. Gay–Lussac’law

3. Avogadro’s law

4. Quantitative Analysis

5. Chemical analysis.

6. Volumetric analysis

7. Titration

8. Indicator

9. Equilibrium system

10. Saturated Water vapour pressure

11. Irreversible reaction

12. Reversible reaction

13. Chemical Equilibrium

14. Rate of chemical reaction

15. Law of mass action

16. Collision theory

17. Activation energy

18. Activated molecule

19. Le Chatelier's principle

20. Catalyst

21. Enzyme

22. Complete ionization

23. Incomplete ionization

24. Ionic equilibrium

25. Ostwald's law

26. Ionic product of water

27. pH value

28. Solubility product

29. Coulomn

30. Faraday

31. Secondary cell

32. Electromotive series

33. Standard hydrogen electrode

34. Anode

35. Redox reaction

36. Galvanic cell

37. Mercury cell

38. Primary cell

39. Electrolysis

40. Cathode

Answer Definitions

1- Molecular mass in gram

2- The volume of gases involved in a reaction and gases produced are exist in fixed ratio

3- Equal volumes of gasses under the same p.and temp. contains equal no. of molecules

4- Determination of the concentration or quantity of the constituents of the sample

5- A branch of chemistry deals with the methods and instruments used for both qualitative

and quantitative analysis

6- It is based on measurement of the volume of the substance to be analyzed

7- Measuring the amount of a reagent of known concentration (standard solution) that is completely by the analyte

8- Substance which change its colour in the reaction medium , indicators are used to detect the end point of the reaction

9- It is apparently a stationary system but in reality dynamic.

10- The maximum water vapour pressure at a certain temperature

11- It proceeds in one direction because products cannot react together to form the reactants

12- It proceeds in forward and backward direction by the same rate at the same conditions

13- When the rate of the forward reaction equals the rate of the backward reaction at the same condition

14- The change of concentration of reactants or products per unit time

15- At constant temperature the rate of the reaction is directly
proportional t the product of the multiplication of the reactant
concentrations, each one is raised to the power of the number of
molecules or ions in balanced equation

16- To have a chemical reaction molecules must collide with each other

17- The minimum amount of energy must be gained by molecules to react at collision

18- The molecule which has kinetic energy equals to or more than activation energy

19- The changes in any of the conditions of a chemical
equilibrium such as conc., p. or temp. cause shift the equilibrium in
the direction which will oppose this change

20- Substance causes a change in the rate of chemical reaction without itself being changed

21- High molecular weight protein produce in living cell an acts as a catalyst

22- All molecules are converted into ions

23- Some molecules are converted into ions

24- The equilibrium arising between molecules of a weak electrolyte and its ions

25- At a constant temperature , the degree of ionization increases by dilution

26- Multiplying concentration of hydrogen ion times that of hydroxide ion ( it = 10-14 )

27- The negative logarithm of hydrogen ion concentration .( it
is a way to express the degree of acidity or alkalinity of a solution)

28- It is the product of multiplication of the concentration of
its ions, raised to the power of the number of ions which exist in
equilibrium with its saturated solution

29- The multiplying of electric current intenisity in ampere and time in second.

30- Amount of electricity needed to form equavelent weight of element during electrolysis

31- Galvanic cell is characterized by its reversible chemical reaction

32- Descending arrangement of elements according to their negative reduction potential

33- The standard electrode which has electric potential equals zero

34- The electrode at which oxidation process takes place in the electrochemical cells

35- Type of a chemical reaction where electrons transfere from one reactant to another

36- System in ehich chemical energy is converted to electric energy through redox reaction

37- A small size cell commonly used in hearing – aid watches

38- Cell where an spontaneous irreversible oxidation reaction takes

39- Redox reaction is forced to occur by using an external applied electric current

40- Positive pole at which reduction takes place in galvanic cell