2.2. Atomic structure and the Periodic Table
A subsection of Chemistry, 0620, through 2. Atoms, elements and compounds
Listing 10 of 345 questions
The diagram shows part of the Periodic Table. I II III IV V VI VII VIII Ca Fe Pt Zn Al Cl Br Ar I C O F K Answer the following questions using only the symbols of the elements in the diagram. Each symbol may be used once, more than once or not at all. State the symbol of the element that: provides an inert atmosphere in lamps forms an oxide which is used to neutralise acidic industrial waste has an atom which forms a stable ion by the loss of one electron is a metal used as an inert electrode forms an ion whose aqueous solution gives a green precipitate on addition of aqueous sodiumhydroxide. Chlorine is an element. State the meaning of the term element. An isotope of chlorine is shown. 35Cl Deduce the number of protons and neutrons in this isotope. number of protons number of neutrons  Complete the electronic structure of a chlorine atom. Cl  
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THEORY
2020
Paper 3, Variant 2
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The diagram shows part of the Periodic Table. I II III IV V VI VII VIII Ca H Pt Al Cl Br Ar I N O F K Answer the following questions using only the symbol of the elements in the diagram. Each symbol may be used once, more than once or not at all. State the symbol of the element that: is a fuel which is a gas at room temperature is used to kill bacteria in water forms a stable ion of type X3+ is a grey‑black non-metallic solid at room temperature forms an ion which, on addition of aqueous sodiumhydroxide, gives a white precipitate which is soluble in excess aqueous sodium hydroxide. Sulfur has several isotopes. Identify one correct statement about isotopes. Tick one box. They are molecules with the same number of neutrons but different numbers of protons. They are atoms with the same number of protons but different numbers of neutrons. They are molecules with the same number of protons but different numbers of electrons. They are atoms with the same number of neutrons but different numbers of protons.  An isotope of sulfur is shown. 33S Deduce the number of protons and neutrons in this isotope. number of protons number of neutrons  Complete the electronic structure of a sulfur atom. S  
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THEORY
2020
Paper 3, Variant 3
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The table gives information about five particles, A, B, C, D and E. particle number of electrons number of neutrons number of protons A B C D E State the atomic number of A. State the nucleon number of B. Write the electronic structure of C. Give the letters of all the particles which are: atoms ���������������������������������������������������������������������������������������������������������������������������� positive ions ������������������������������������������������������������������������������������������������������������������ negative ions ���������������������������������������������������������������������������������������������������������������� isotopes of each other. ������������������������������������������������������������������������������������������������� 
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THEORY
2020
Paper 4, Variant 3
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