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 Li Ti Cr Fe Cu Zn C N O F Ne Ar Kr Xe Br I Si Ge Sn Pb Al Cl II III IV V VI VII VIII Answer the following questions using only the elements in the diagram. Each element may be used once, more than once or not at all. Which element forms 78% of the air, has an oxide which is a product of respiration, is used to make food containers because of its resistance to corrosion, forms an ion of type X3+, forms an ion whose aqueous solution forms a light blue precipitate on addition of a few drops of aqueous ammonia? Calcium is an element with several naturally-occurring isotopes. What is the meaning of the term element ? Two of the isotopes of calcium are Ca and Ca . Complete the table to show the number of protons, neutrons and electrons in one atom of each of these isotopes. Ca Ca number of protons number of neutrons number of electrons Determine the number of electrons in one calcium ion, Ca2+.
0620_m16_qp_32
THEORY
2016
Paper 3, Variant 2
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Choose from the list of elements to answer the following questions. aluminium argon carbon lithium magnesium nickel nitrogen oxygen sulfur Each element can be used once, more than once or not at all. Which element forms 21% of dry air, reacts rapidly with cold water to produce hydrogen, is in Group III of the Periodic Table, has atoms which have a complete outer shell of electrons, is a transition element, forms stable ions with a single positive charge? Complete the table to show the number of electrons, neutrons and protons in the nickel atom and oxide ion shown. number of electrons number of neutrons number of protons 62Ni 18O 2–
0620_m17_qp_32
THEORY
2017
Paper 3, Variant 2
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Questions Discovered
345