What is the formula of the ion formed when phosphorus achieves a noble-gas electron configuration?
a. p3
b. p2
c. p2-
d. p3-

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

Are oil and water a mixture or solution

One similarity and one difference between an element and a mixture of elements