1. MC. Matter is made up of tiny and discrete particles.2. MC. Molecule is a group of two or more atoms which are chemically bonded together3. MC. Element is a substance made up of identical atoms.4. MC. Dalton proposes the indivisible unit of an atom is element.5. MC. Nucleon number represents the total number of protons and neutrons in the atom of an element.6. MC Isotopes are atoms of the same elements with the same number of protons but different number of neutrons.7. MC. Gamma rays of cobalt-60 is used to destroy bacteria in food without changing the quality of food.8. MC Relative formula mass is used in place of relative molecular mass9. MC Chemical formulae is a representation of a chemical substance using letters for atoms and subscript numbers to show the numbers of each type of atoms that are present in the substance. 10. MC. Atom is the smallest particle of an element that can participate in a chemical reaction.11. MC. Ion is a positively charged or negatively charged particle.12. MC. Diffusion occurs when parties of a substance move in between the particles of another substance. 13. MC. Rutherford demonstrates the existence of a positively charged nucleus that contains nearly all the mass of an atom.14. MC Proton number is the number of protons in the atom of an element.15. MC Cobalt-60 is used in radiotherapy for the treatment of cancer.16. MC. Carbon-14 is used in carbon dating to estimate the age of fossils and artefacts.17. MC A mole is an amount of substance that contains as many particles as the number of atoms in exactly 12 g of carbon-12.18. TF the value of the molar mass of an element is equal to its relative molecular or formula mass.19. TF the value of the molar mass of a compound is equal to its relative atomic mass.20. T/F To get the nucleon number, the number of protons is added to the number of protons. 21. T/F Phosphorus is used in fertilizers to study the metabolism of phosphorus in plants.22. T/F Sodium-24 is used to detect leak pipes in carrying gas.23. T/F. An element is a substance that cannot be broken down into simpler substances by ordinary chemical methods. 24. T/F. A compound is a substance containing two or more elements joined together by chemical bonds25. T/F A mixture contains two or more substances that are not chemically bonded together26. T/F A chemical method is required for separation.27. T/F The physical and chemical properties of mixture are the same as its components.28. T/F Compound is a fixed composition by mass, which means that it has a fixed melting and boiling points29. T/F All gases move in random motion30. T/F The “Plum Pudding” Model was developed by Thomson.31. T/F Bohn propose fixed circular orbits around the nucleus.