The findings of henri becquerel and the curies to discredit what notion held for a very long time?
1.that matter can never be created or destroyed.
2.matter is made up of any smaller parts.
3.matter is radioactive and decays over time.
4.that matter is invisible and indestructible.

Henri Becquerel is considered as father of radio activity. He was the first one who experimentally demonstrated the radioactivity and the nature of particles i.e alpha particle,beta particle and gamma particle.

Madam curie assisted by her husband invented  various artificial radio active elements like radium.

Radio activity is the process of disintegration of a  unstable nucleus into various other nuclei with release of radioactive radiations.

Hence out of four options only option 3 is correct which tells that matter is radioactive and decays over time.

The options 1 ,2 and 4 are the direct consequences of Dalton's law.

bacteria that live on the ocean floor are sustained by phytoplankton. phytoplankton, microscopic marine photosynthetic organisms, have a vastly significant role to play not only in the marine food web of which they’re part of, but also on a more global scale. despite their infinitely small size in comparison to other marine organisms, these tiny creatures occupy an immensely important ecological niche: they are the foundation of the marine food web, and as primary producers, play key roles in supporting all other organisms in the marine environment, as well as in the regulation of the earth’s climate through the sequestration of carbon, oxygen production, and other related processes. phytoplankton account for roughly half of all global primary productivity; therefore, their significance extends far beyond the marine environment alone. there is an intriguing sense of irony in the realization that these tiny living beings that often live out their existence unnoticed and undetected by the rest of the world, have such a far-reaching impact on the lives of virtually all other living organisms on the planet, particularly on those in the marine environment. the world that we have become accustomed to has been and is continuously shaped by the workings of these miniscule yet vital “plants of the sea”.

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