1) Compared to a proton, what are the relative mass and charge of an electron? a) Relative mass 1, relative charge 0.0005 b) Relative mass 0.0005, relative charge +1 c) Relative mass 0.0005, relative charge -1 2) Compared to a proton, what are the relative mass and charge of a neutron? a) Relative mass 1, relative charge -1 b) Relative mass 1, relative charge +1 c) Relative mass 1, relative charge 0 3) Isotopes of an element have: a) The same atomic number but different mass numbers b) The same atomic number and mass number c) Different atomic numbers but the same mass number 4) The elements in the periodic table are arranged in order of increasing: a) Mass number b) Proton number c) Neutron number 5) The electronic structure of an element X is 2.8.5 a) An atom of X has 5 occupied shells b) An atom of X has 15 electrons c) Element X is nitrogen 6) What is the electronic structure of aluminium, atomic number 13? a) 2.8.3 b) 2.4.7 c) 2.3.8 7) Which of these formulae belongs to an ion? a) Fe b) Na c) Na+ 8) Which atoms usually gain electrons to form negative ions? a) Metal atoms b) Non-metal atoms c) Group 0 atoms 9) Metal atoms form a) Positive ions by gaining electrons b) Negative ions by gaining electrons c) Positive ions by losing electrons 10) ionic bonding: a) Oppositely charged ions attract one another b) Oppositely charged ions repel one another c) Ions with the same charge attract each other 11) Sodium chloride conducts electricity when: a) Solid or molten b) Solid or in solution c) Molten or in solution 12) What is the formula for magnesium chloride (contains Mg2+ and Cl- ions)? a) MgCl b) Mg2Cl c) MgCl2 13) What is the formula for calcium hydroxide (contains Ca2+ and OH- ions)? a) CaOH2 b) Ca(OH)2 c) Ca2OH 14) Covalent bonds form between: a) A metal and a non-metal b) Non-metals c) Metals 15) What is a covalent bond? a) A shared electron b) A transferred electron c) A shared pair of electrons 16) The electronic structure of element X is 2.8.5 - it belongs to: a) Group 3 b) Period 5 c) Group 5 17) What do the elements in group 2 have in common? a) They all have two electrons in their outer shell b) They all have six electrons in their outer shell c) They all form ions with two negative charges 18) Which statement is correct? a) The elements in a period have similar properties b) The elements in a group have similar properties c) Elements in groups become more reactive going down the group 19) The end a) yes b) no

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