Question

the second one of this pic

Answer 1

Answer:

you solve this question by eliminating method or substitution method

please mark me as brainalist

likes also

Answer 2

Answer:

Atoms are the building blocks of all matter. When a substance contains only one type of atom, it is called an element. ... An element is a pure substance and is made of only one type of atom; it cannot be broken down into a simpler substance.Atoms are the building blocks of all matter. When a substance contains only one type of atom, it is called an element. ... An element is a pure substance and is made of only one type of atom; it cannot be broken down int

pler substance.. . .