What was dmitri mendeleev’s dream that reportedly was the start of his periodic table?.

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

The equation picture below shows which type of nuclear reaction u 235 + n x e 134 + sr 100 + 2n

I’m an electrically neutral atomic any element, there are equal numbers of