Why do scientists use the scientific method? O A. It helps them determine whether an idea is supported by evidence.
B. It helps them make sure a certain question has not been asked
before.
C. It helps them do research that other scientists can understand.
D. It helps them ask questions that affect as many people as
possible.

A. It helps them determine whether an idea is supported by evidence.

Explanation:

the scientific method contains experimentation and analyzing results that will either disprove or support a given idea. this conclusion can also be reached by the process of elimination.

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.