DONT OVERLOOK THIS QUESTION! its easy peasy

Rutherford's experiment indicated that matter was not as uniform as it appears what part of his experimental results implied this idea

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li