JADUAL BERKALA KUMP. 1

Which of the following shows the number of protons of an element in Group 1 of the Periodic Table of the Elements?

Manakah antara berikut menunjukkan nombor proton bagi Unsur di dalam Kumpulan 1 Jadual Berkala unsur?

• 3

• 7

• 13

• 17

Which statement explains why the size of the atoms of Group 1 elements increases when going down the group in the Periodic Table?

Pernyataan manakah menerangkan saiz atom Kumpulan 1 meningkat apabila menurun kumpulan di dalam Jadual Berkala?

• number of protons increase

  bilangan proton bertambah

• relative atomic mass increases

  jisim atom relatif bertambah

• number of valence electrons increases

  bilangan elektron valens bertambah

• number of shells filled with electrons increases

  bilangan petala yang berisi elektron bertambah

Which statement explains why the reactivity of Group 1 elements increases when going down the group?

Pernyataan manakah yang menerangkan kereaktiviti unsur Kumpulan 1 meningkat apabila menuruni kumpulan?

• The physical state if the elements changes from gas to liquid to solid at room temperature.

  Keadaan fizikal unsur berubah daripada gas kepada cecair kepada pepejal pada suhu bilik.

• The attractive force between valence electron and the nucleus becomes stronger

  Daya tarikan antara elektron valens dan nukleus bertambah kuat

• The valence electron get further from the nucleus

  Elektron valens semakin jauh dengan nukleus

• The melting points of the elements decreases

  Takat lebur unsur berkurang

Which of the following statements is true of Group 1 elements when going down the group?

Pernyataan manakah yang benar bagi unsur kumpulan 1 apabila menuruni kumpulan?

• reactivity decreases

  kereaktifan berkurang

• atomic size decreases

  saiz atom berkurang

• melting point increases

  takat lebur meningkat

• electropositivity increase

  keelektropositifan meningkat

X is an element that has the following properties.

X adalah unsur yang mempunyai sifat berikut.

- Soft solid / Pepejal lembut

- React with cold water to form alkaline solution / Bertindak balas dengan air sejuk untuk membentuk larutan beralkali

-Store in paraffin oil / Disimpan di dalam minyak parafin

Among elements A, B, C and D in Periodic Table of elements, which element represent X?

Antara unsur A, B, C dan D di dalam Jadual Berkala unsur, manakah adalah unsur X?

• A

• B

• C

• D

Which of the following metals burn with a very bright purplish flame in a gas jar filled with oxygen and produces a white residue?

Manakah antara logam berikut terbakar dengan nyalaan ungu di dalam balang gas yang mengandungi oksigen dan menghasilkan baki putih?

• Lead / Plumbum

• Silver / Argentum

• Sodium / Natrium

• Potassium / Kalium

The diagram shows the set up of the apparatus for an experiment to study the reaction between chlorine gas and alkali metal.

When reaction is completed, a white solid is observed. Name the substance produced.

Rajah menunjukkan susunan radas eksperimen untuk mengkaji tindak balas antara gas klorin dan logam alkali.

Apabila tindak balas lengkap, pepejal putih diperhatikan. Namakan bahan yang terbentuk.

• Copper (II) chloride

  Kuprum (II) klorida

• Iron (II) chloride

  Ferum (II) klorida

• Lithium chloride

  Litium klorida

• Lithium oxide

  Litium oksida

Which of the following elements burn in air to form an oxide and when the oxide dissolves in water, it turns red litmus to blue?

Manakah antara unsur berikut terbakar di udara untuk membentuk suatu oksida dan apabila oksida dilarutkan di dalam air, ia menukarkan kertas litmus merah ke biru.

• sodium

  natrium

• carbon

  karbon

• hydrogen

  hidrogen

• chlorine

  klorin

Which chemical equation represents the reaction between sodium metal and oxygen gas?

Manakah persamaan kimia mewakili tindak balas antara logam natrium dan gas oksigen?

• Na + O₂ ----> NaO₂

• Na + O₂ ----> Na₂O

• 2Na + O₂ ----> Na₂O

• 4Na + O₂ ----> 2Na₂O

Apabila menuruni kumpulan 1, jejari atom unsur dalam kumpulan ini

• bertambah

• berkurang