Differentiate between modern periodic table and mendeleevs table?
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what is the difference between heat and temperature?
Explain the Chemical change?
What is the difference between iron and steel ?
When we pour into a tumble, bubbles ate seen outside why?
What is weak acid?
describe the lewis dot structure of Mg2+?
However ozone is heavier than oxygen still ozone is up there in sky why?
What is Evaporation ?
What is the safety curtain in cinema or theatre made off ?
What is Atomic number?
Why can?t the meat and dal( pulses ) be cooled well on the top of high mountains ?
What is the octane number range of te petrol used in India ? 1)90-95 2)90-99 3)80-90