Page 221 - MODUL KIMIA A+XPLOSIVE SPM (LATEST)

ANSWER SCHEME
PAPER 1

Topic Answer Explanation
NO BAB
Topik Jawapan Penerangan

A
X
Z
A represents nucleon number = the total number of
proton and neutron in an atomic nucleus
The Structure of
1 1 D
the Atom
A mewakili no nukleon = jumlah bilangan proton
dan bilangan neutron dalam nukleus atom

12+11 = 23

Z represents the number of proton = 11
Z mewakili bilangan proton = 11
At the melting point, a solid exists both in solid and
liquid forms
The Structure of
2 1 D
the Atom Pada takat lebur, satu pepejal wujud dalam keadaan
pepejal dan cecair

The number of proton number of bromine -80 and
bromine -81 is 35 respectively, both has equal
number of valence electron in its shell thus having
the same chemical properties.
The Structure of
3 1 A
the Atom
Bilangan proton bromin-80 dan bromin-81 masing-
masing ialah 35 dan mempunyai bilangan elektron
valens yang sama maka, mempunyai sifat-sifat kimia
yang sama
Chemical
3+
Formulae and D Al O 2-
4 2
Equations
Al 2O 3
Chemical
2+
2-
5 2 Formulae and B Ca ( CO 3)

Equations
Zn(OH) 2 (p) + 2HNO 3 (ak)
Chemical (bahan tindak balas/reactants)
6 2 Formulae and B  Zn(NO 3) 2 (ak) + 2H 2O (ce)
Equations
(hasil tindak balas/products)
Periodic Table of Descending a group; the proton number increases
7 3 D
Elements thus the atomic size of an atom increases

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