1 Which of the following is correct? flag bookmark A Ernest Rutherford – neutron B J. J. Thomson – electron C James Chadwick – proton D John Dalton – proton T4 Chapter 2.2 The Development of the Atomic Model J. J. Thomson discovered the electron, so B is correct. Rutherford is linked to the proton, Chadwick to the neutron, and Dalton to atomic theory, not protons.
2 Diagram 1 shows the arrangement of particles in three states of matter at room temperature. What are substances P, Q and R at room temperature? flag bookmark A P: Water; Q: Glucose; R: Hydrogen B P: Water; Q: Hydrogen; R: Glucose C P: Glucose; Q: Hydrogen; R: Water D P: Hydrogen; Q: Water; R: Glucose T4 Chapter 2.1 Basic Concepts of Matter P shows widely spaced particles (gas), Q shows loosely packed particles (liquid) and R shows closely packed particles (solid). At room temperature hydrogen is a gas, water a liquid and glucose a solid.
3 Which of the following are the symbols for the elements chromium, manganese and potassium? flag bookmark A Chromium: C; Manganese: Mg; Potassium: K B Chromium: C; Manganese: Mn; Potassium: P C Chromium: Cr; Manganese: Mg; Potassium: P D Chromium: Cr; Manganese: Mn; Potassium: K T4 Chapter 4.4 Elements in Group 1 T4 Chapter 4.7 Transition Elements Chromium is Cr, manganese is Mn, and potassium is K; Mg is magnesium, not manganese.
4 Elements in the Periodic Table are arranged according to an increase in flag bookmark A proton number B nucleon number C relative atomic mass D relative molecular mass T4 Chapter 4.2 The Arrangement in the Periodic Table of Elements Elements are arranged by increasing proton number, which defines each element’s identity and order in the Periodic Table.
5 Which compound is formed by transferring electrons? flag bookmark A Oxygen B Carbon dioxide C Sodium chloride D Hydrogen peroxide T4 Chapter 5.2 Ionic Bond Sodium chloride is ionic, so its atoms form by transferring electrons from sodium to chlorine. The other options are covalent compounds, which share electrons instead.
6 What is the period for an element with proton number 20? flag bookmark A 5 B 4 C 3 D 2 T4 Chapter 4.2 The Arrangement in the Periodic Table of Elements Proton number 20 gives electron arrangement 2.8.8.2, so it has 4 shells; period equals number of shells.
7 Which of the following is an element? flag bookmark A Ammonia B Methane C Naphthalene D Oxygen T4 Chapter 2.1 Basic Concepts of Matter Oxygen is an element because it consists of only one type of atom. Ammonia, methane, and naphthalene are all compounds made of two or more elements combined.
8 Which of the following is a use of cobalt-60? flag bookmark A Estimate the age of fossils B Investigate the metabolism in plants C Sterilise surgical instruments D Treat thyroid disease T4 Chapter 2.4 Isotopes and Its Uses Cobalt-60 emits gamma rays that kill microorganisms, making it useful for sterilising surgical instruments.
9 Which of the following is a use of a Group 18 element? flag bookmark A Helium is used in lighthouse lamps B Neon is used in advertising board lights C Krypton is used in clothes bleach D Xenon is used in weather balloons T4 Chapter 4.3 Elements in Group 18 Neon, a Group 18 noble gas, glows brightly when an electric current passes through it, so it is used in advertising board lights.
10 Which of the following is true about the properties of the oxides of elements when going across Period 3? flag bookmark A Na_2O is a basic oxide B Al_2O_3 is an acidic oxide C SiO_2 is a basic oxide D MgO is an acidic oxide T4 Chapter 4.6 Elements in Period 3 Na₂O is a basic oxide because sodium is a metal with low electronegativity, forming an ionic oxide that reacts with water to produce a base.