01:55
Is earth's north pole actually in north?(рдХреНрдпрд╛ рдкреГрдереНрд╡реА рдХрд╛ рдЙрддреНрддрд░реА рдзреНрд░реБрд╡ рд╡рд╛рд╕реНрддрд╡ рдореЗрдВ рдЙрддреНрддрд░ рдореЗрдВ рд╣реИ?)
26:10
oxidation and reduction reaction explained
23:39
TYPES OF CHEMICAL REACTION
25:43
chemical reaction ( characteristics and conditions required for chemical reactions)
19:55
chemical reaction, word equation into symbolic form and balancing chemical equations
20:10
basics of chemistry part 3( ions , molecular formula, and molecular mass)
17:19
basics of chemistry part 2( electronic configuration, valency and formula of compounds)
20:37
basics of chemistry part1 ( matter, structure of atom, elements)
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