Answer: In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them
Explanation:
Answer:
A! it is a unique object with significance to rider
Explanation:
i took the test
I'd be able to answer this but I don't know what the arthor wrote. Could you please comment on this with a picture of what the arthor wrote please ☺?
