SOALAN [END YEAR SBP] FORM 4

END-YEAR SBP FORM 4
2010 PAPER 1
2010 PAPER 2 
2010 PAPER 3

EXPERIMENT : EMPIRICAL FORMULA (SPOT)

Empirical Formula (Formula Empirik)
Formula show simplest ratio of atoms of each element in the chemical compound. 
Formula yang menunjukkan nisbah terkecil atom bagi setiap element di dalam sebatian kimia.

Tips SPM : Calon mesti tahu definisi 'empirical formula'.


ANALISIS SOALAN SPM (2003-2010)

STRUCTURE QUESTION

SPM 2003 /PAPER 2/ QUESTION 1

Experiment to determine the empirical formula of magnesium oxide.

SPM 2007 /PAPER 2/ QUESTION 3

Experiment to determine the empirical formula of two compounds by different methods.

SPM 2009 /PAPER 2/ QUESTION 3

Experiment to determine the empirical formula of copper oxide

SPM 2004/ PAPER3/ QUESTION 1

Experiment to determine the empirical formula of magnesium oxide.

ESSAY QUESTION. 

SPM 2010 / PAPER2/ QUESTION 7

Determine the empirical formula and molecular formula of hydrocarbon

ISOTOPES (SPOT)

ISOTOPES : Atoms of an element has same proton number but different nucleon number.

Fact #1 Isotopes mempunyai nucleon number yang berbeza tetapi proton number tetap sama.
Fact #2 Elements yang sama sudah semestinya number of proton yang sama
Fact #3 Nucleon number = number of proton + number of neutron

when nucleon number different (same elements) = number of neutron different

example : carbon-12 and carbon-14

Name of element : CARBON
Proton number    :  6

Nucleon number Carbon-12 = 12
Number of neutron Carbon-12 = 12 - 6    = 6

Nucleon number Carbon-14 = 14
Number of neutron Carbon-14 = 14 - 6    = 8



Conclusion : Isotopes of elements has different number of neutron and nucleon number but same number of protons.