25. which of the following statements is true for
the element sulfur?
a it has 17 neutrons
b it has more electrons than argon
c its symbol is su
d it has 6 electrons on its third energy level

Sulfur's atomic number is 16, meaning it has 16 protons and 16 electrons. This also rules out the statement "it has 17 neutrons". This also rules out the second statement "it has more electrons than argon". Argon's atomic number is 18, telling us it has 18 electrons and 18 protons. Of course, 16 is less than 18, so argon has more. Sulfur's atomic symbol is S, not Su, which doesn't even represent an element at all. This leaves us with the last statement "it has 6 electrons on its third energy level." This is true, as Sulfur does indeed have 6 electrons filling its third energy level.

answer; i believe that the correct answer is (a) potassium(k)

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: