Elements and Gases Crossword Puzzle

QUESTIONS LIST: alkali: the name given to metals of group 1, halogen: the name given to elements of group 7, lithium: the least reactive metal in group 1, fluorine: the most reactive elements in group 7, tarnish: the newly cut na will _ quickly on exposure to air, lilac: the flame colour when potassium burns, ionic: type of bonding formed when group 1 reacts with group 7, phenolphthalein: the indicator that turns pink when sodium reacts with water, corrosive: you can’t touch na with bare hands because it’s _ , hydroxide: the ion responsible for the color change of universal indicator when k reacts with water, bromine: halogen that is liquid at room temperature, iodine: halogen that is solid at room temperature, diatomic: f2 is called _ molecule because two atoms bonded to form the molecule, poisonous: halogens have to be handled in a fume cupboard because they are extremely _ , bleached: when cl2 is passing through damp litmus paper, it will get _ , hydrochloric: the acid formed when hcl dissolved in water, displacement: _ reaction can be used to determine the reactivity of halogens, spectator: ions that are not changed in a chemical reaction, nitrogen: the most abundant gas in air, greenhouse: carbon dioxide can cause global warming because it’s _ gas, thermal: breaking up of something by heating it is called () decomposition reaction, green: the color of cuco3