A metal is treated with dilute hydrochloric acid in a test tube. A burning match stick is brought
near the mouth of the test tube, but no sound is
heard.

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What is the molar mass of potassium nitrate, kno3