Answer :
The statement oxygen is negative and hydrogen is positive is true.
How to determine charge on an element?
Charge on an element is determined by the position of an element in the periodic table.More precisely,it is determined by an element's electronic configuration.
Elements having one electron in their outermost or valence shell are situated to the left of the periodic table and are positive as they loose their one electron present in valence shell to form cations that are positively charged ions.
Elements having six or seven electrons in their valence shell tend to gain one or two electrons respectively to complete their octet.These elements form anions that are negatively charged ions.
Hydrogen with atomic number 1 has 1 electron in it's valence shell which it looses to acquire a positive charge and hence form a cation .
Oxygen on the other hand,with atomic number 8 has 6 electrons in it's valence shell and thus gains 2 more electrons to complete the octet,and hence gain a negative charge and form an anion.
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