03:32
Charge Electroscope by Induction using a positive charge
04:14
Charge Electroscope by Induction with a negative
03:10
Charge by Induction using a positive
03:00
Charge by Induction using a negative
02:56
Induction
03:19
Charge by Touch positive and neutral
04:13
Charge by Touch negative and neutral
03:29
Charge by Touch drawing objects
01:59
Charge by Touch basic
04:02
Count atoms in a molecule CH3(CH2)2COOH
01:45
Count atoms in a molecule Mg3(PO4)2
02:11
Count atoms in a molecule Ca(NO3)2
01:07
Count atoms in a molecule H2SO4
04:13
Draw molecules C3H4(CH2)2
04:35
Draw molecules example 3
02:40
Draw molecules example 2
02:05
Draw molecules example 1
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