Which of the following methods is not used to locate underground oil reserves?

a.

sonar

b.

core samples

c.

electrical signals

d.

mining

Select the atomic models that belong to the same element

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

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!