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why the apparance of both gas jars is same after several hours?

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what is the charge on proton and electron?

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element A is Group 1 & Period 2 element C is in Group 2&period 3 element B is in group5 &period 2 element D is in group 8&period 3

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why during a state change shown in pictre above the temperature remains constant?

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State the difference between proton number and mass numer?

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What idea strikes in your mind about factors affecting rate / speed of diffusion.

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name the process shown in diagram.

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what does the number 20 and 40 represents in the symbol of ca shown above?

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what is the total number of electrons in Na atom shown in diagram?

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which state change is happening at B-C?

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Which state of matter has most disorderly arrangement of particles?