KUIZ KIMIA

Table 1 shows the proton numbers of 2 elements,P and Q

ELEMENTS                    PROTON NUMBERS

      P                                                9

      Q                                               12

(a)     Draw the atomic structure of atom  P.

(b) (i) The atom of element P has isotopes. What meant by isotopes?

     (ii) State one example of isotopes.

 (c) (i) The atom of element Q has a nucleon numbers of 24.Calculate the numbers of nucleon.

      (ii) Write the standard representation of atom Q.

(d) Ammonia has melting point of -78c and boiling point of 33c

  

   (i) What is the physical state of ammonia at room temperature?

   (ii)Draw the arrangement of particles of ammonia at 0c

   (iii) Sketch the graph of temperature against time when ammonia heated from -100c to 0c.

THREE TYPES OF PARTICLES

Particles forming matter

Atom    :

             The simplest form of particles (basic unit of mater)

Example:

             All metals and some non-metals,such as graphite and diamond are made up of only one type of atom

Molecule: 

              Particles made up of a combination of two or more atoms in certain arrangements through     chemical bonds

Example:

              Almost all non-metal elements such as bromine Br2,napthalene,benzene,C6H6,and water,H2O,are made of molecules

Ion       :

              Particles made of atoms which receive or lose electrons

Example:

              Ionic subtances such as sodium chloride,NaCl, lead (II) bromide, PbBr2, and potassium  hydroxide,KOH, are made up of ions.

TIPS SOALAN PERCUBAAN

SILA BACA DAN AMBIL PERHATIAN KERTAS 1

1. What is saturated hydrocarbon
2. Meaning of monomer and polymer
3.Definition of oxidation and reduction
4.Group 17 element of periodic table
5.Meaning of 1 mole
6.Example of highest rate of reaction
7.Contact process
8.Period 3 periodic table
9.Example of endothermic reaction
10. Group 1 chemical reaction
11. Degree of dissociation of acid
12.Reaction between zinc and acid
13.Electrolysis of concentrated solution
14.Electrolysis of aqueous solution - product at anode and cathode
15.Electron arrangement and chemical bond
16.Rate of reaction- factors that affect
17. Pentene and pentane- the difference?
18.Group 17elements
19.Calculation - mass? volume of gas ? molarity ?
20. Heat of precipitation - calculation
21.Electrolysis of copper (II)sulphate solution
22. Formation of ester- alcohol ?  carboxylic acid ? 
      structural formula?
23.Chemical cell.

STUDY HARD . CHEMISTRY TARGET 'A' SCORE 'A'
  ALL THE BEST

CONCEPT FOCUS

                                                   

                                                     CuSO4 . 5H2O

                                                                              ^                   

The full stop does not mean`multiply`.It means that the relative molecular mass for 5 water molecular must be added during calculation.

                                                               CuSO4 . 5H2O

                                                                              ^

Titik noktah ini tidak bermaksud `darab`.Jisim molekul relatif bagi  5 molekul air mesti di tambah semasa pengiraan.

                Rajah hablur kuprum(II) sulfat/ copper(II)sulphate

                                               

SHARING OF ATOMS

TWO ATOMS SHARING

• 1 pair of electrons form a single covalent bond.
• 2 pairs or electrons form a double covalent bond.
• 3 pairs of electrons form a triple covalent bond.

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