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The concept of gas masks can be attributed to Garrett Morgan, an African American inventor who patented an early version in 1914. However, the modern gas mask as we know it today was further developed and improved by scientists and engineers during World War I to protect soldiers from chemical weapons.

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Where did the idea of an atom come from?

around 2,500 years ago this Greek man called Democritus was sitting around just thinking. He was thinking about cutting stuff up and came up with the idea that there must be a point where you could no longer cut something any smaller. He named the atom after the Greek word atomos, which means that which can't be split. here...


Who came up with the idea of a nucleus of an atom?

The discovery of the nucleus is typically credited to Ernest Rutherford, an English physicist of the early 1900s. Rutherford first came up with the idea of a nucleus as a result of his gold foil experiments.


Who was the scientist that came up with the idea of the pH scale?

The concept of the pH scale was introduced by Danish chemist Søren Peder Lauritz Sørensen in 1909 while working at the Carlsberg Laboratory. Sørensen defined pH as the negative logarithm of the hydrogen ion concentration in a solution.


What scientists came up with the concept of conjugate acid-base pairs?

The concept of conjugate acid-base pairs was proposed by G. N. Lewis in 1923. Later, this concept was further developed by G. S. Hammond in 1955, who introduced the idea of considering the relative stability of the conjugate acid-base pairs.


What was the important idea that democritus had 2000 years ago about the substances that make up the world?

Democritus proposed that all matter is made up of tiny, indivisible particles called "atoms." He believed that these atoms are in constant motion and vary in shape and size, forming different types of matter through their arrangement. This idea laid the foundation for modern atomic theory.