Which of these elements is least likely to react with other elements

A. calcium

B. Argon

C. sodium

D. Nitrogen

E. Oxygen

F. Chlorine

Non examples of gravity?

Sandra's is riding a bicycle at 10.0 meters/second. She slows down to 2.0 meters/second in 10 seconds her acceleration is

Math skills would fall under which category?

What kind of mixture is a solution? a colloid?

Are oranges called oranges because oranges are orange, or is orange called orange because oranges are orange?

What conclusion can be drawn from the statement that an element has high electron affinity, high electronegativity, and a high ionization energy? A) The element is most likely from Group 1A or 2A and in period 1 or 2.

When a cyclist rides past you on the street, this is an example of

Why are galaxies visible

I hockey puck slides across an ice rink more easily than it does across a rough concrete surface why is this

Sodium-22 Sodium-25 # of protons # of neutrons # of electrons