Q1: Which of the following of Dalton's theories do we still use today? matter is composed of small tiny particles called atoms
atoms cannot be divided
atoms of the same element are identical in size, mass, and properties

Q2:How many neutrons are there for ^242U?

92 neutrons
238 neutrons
242 neutrons
150 neutrons

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

the pseudoscience are like beliefs, theories, or like practices that are considered scientific