latihan soalan esei- Kimia Tingkatan 4

Latihan Esei Tingkatan 4

1. (2) Rajah 7.1 menunjukkan susunan elektron bagi atom unsur X dan unsur Y yang
terletak dalam kumpulan yang Sama dalam Jadual Berkala Unsur
Diagram 7. shows the electron arrangement for atoms of element X and element Y
which are located in the same group inthe Periodic Table of Elements

Ae
A

Rajah 7.1
Diagram 7.1

Berdasarkan Rajah 7.1
Based on Diagram 7.1

(© Nyatakan maksud bagi elektron valens dan nyatakan kumpulan di
terletaknya unsur X dan unsur Y dalam Jadual Berkala Unsur
Slate the meaning of valence electron and ste the group where element X
‘and element Y are located inthe Periodic Table of Elements

12 markahl 2 marks}

Tullis persamaan kimia bagi tindak balas antara unsur X dan gas oksigen,
Hitung jsio basil indak balas yang diperoleh jika 1200 em’ gas oksigen

sigonakan dalam tndak balas tersebut

sim atom relatif O = 16, X = 23. Isi padu molar gas pada keadaan bilik
24 dm’ mol]

Write the chemical equation for the reaction behreen element X and

Caeulate the mass of the product obtained if 1200 cm’ of oxygen gas is us
Relative atomic mass: O = 16, X = 23, Molar volume of gos at room condition
24 dm mer]

$5 marta 5 marks)

Unsur X dan unsur Y menunjukkan sifat kimia yang sama tetapi dengan
kereaktifan yang berbeza

Bandingkan kercaktifan unsur X dan unsur Y

Terangkan jawapan anda

Element X and element Y shows the same chemical properties but with
different reactivity

Compare the reactivity of element X and element Y

Explain your answer,
[3 markah/ 3 marks]

2. Soalan
TO

@w

Cadangan Jawapan Marian

[Elektron yang Teretak pada petala terluar suatu atom 1

Electron at the outermost shell of an atom

Kumpulan 1/ Group 1

AK +O: DON
ANa + Oz 2Na:0
Bil mol gas oksigen = 1.2
24
= 0.05 mol

1molO: 2 mol Na;O
0.05 mol Os 0.1 mol Na:0

disim NasO = 0.1 x [2(23) + 16]
=629

a)

Unsur Y lebih reakiif dari unsur X
Saiz atom Y lebih besar/Jarak antara nukleus dengan
elektron valens lebih jauh

Daya tarikan antara nukleus dan electron valens lebih
lemah/Alom Y lebih mudah membebaskan elektron

Element Y is more reactive than element X
Size of atom Y is bigger/Distance of nucleus and
valence electron is further

Force of attraction between nucleus and valence
electron is weaker/Y atom is easier to release electron