1.The easiest way to start grouping substances is bycomparing their physical properties. collect thesamples of following metals – iron, copper,aluminium, magnesium, sodium,…

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1. The easiest way to start grouping substances is by comparing their physical properties. collect the samples of following metals – iron, copper, aluminium, magnesium,…

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* British designer Vivienne Westwood (born 1941) is often credited with being the creator of "punk fashions, " among other trend-setting styles. Vivienne Westwood…