Help me please 1)search information about the periodic table of the elements and the classification of the elements​​

Y=‐1x + 7 if y has a value of ‐24 what is the value of x?

Iknow #2 is d. i just need to know why

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right