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|NEON has 2 isotopes of differing mass in different proportions [²⁰Ne - 91%, ²²Ne - 9%]. Which of these demonstrates how we calculate its relative atomic mass (Ar) in g/mol?||[(91 x 20) + (9 x 22)] ÷ 100 = 20.2|
|Which of these statements about TRANSITION ELEMENTS is FALSE?||[All of these are false]|
|Which of these metals will react with COLD WATER?||[All of these]|
|Which of these statements about TRANSITION ELEMENTS is TRUE?||Transition elements make COLOURED compounds
Transition elements or their compounds OFTEN act as CATALYSTS
|COPPER based compounds generally tend to have a…||BLUE colour|
|Dimitri Mendeleev was able to accurately predict the PROPERTIES of undiscovered elements because…||of the way he ARRANGED the periodic table and the GAPS in the periods|
|Sodium (s) + water (l) →||sodium hydroxide (aq) + hydrogen (g)|
|Lithium [ALKALI METAL] + chlorine [HALOGEN] →||lithium chloride|
|Dmitri Mendeleev arranged the PERIODIC TABLE in order of…||relative atomic mass (RAM)|
|If an element is INERT, then it is…||Unreactive|
|The ATOMIC NUMBER of SODIUM is 11. Which of these shows the ELECTRON STRUCTURE of one of its ATOMS?||2,8,1|
|Noble gases all have a density that is…||LOW; they're all gases|
|Different ISOTOPES of an element have…||[All of these]|
|Elements in the SAME GROUP tend to have similar…||Chemical properites|