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question_answer1) In a chemical reaction ________ is transferred from one atom to another.
question_answer2) From which of the following orbits, valance electrons are obtained?
question_answer3) In the chemical reaction between sodium and chlorine, which one of the following elements is positively charged and called positive ions?
question_answer4) In the chemical reaction between sodium and chlorine, one electron of sodium is occupied by chlorine. Then the chlorine has which one of the following charges?
question_answer5) In a chemical equation, number of atom is written in front of the symbol of the substance. Which one of the following represents the number of molecule of the substance?
question_answer6) The given symbol is representing which one of the following ?
question_answer7) In the periodic table, valance electrons are denoted by which one of the following form of numbers?
question_answer8) The chemical reaction between methane and oxygen is used to obtain which one of the following substances?
question_answer9) Which one of the following method is adopted for the grouping of the elements in the periodic table?
question_answer10) A symbol above the arrow in a chemical reaction is used for the notation of heat energy added in the chemical reaction. Which one of the following symbol is used for the same?
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