Deuterium can be written as 2H. Determine the number of protons, neutrons and electrons in a neutral deuterium atom.

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

Measuring which physical property is most likely to produce the most precise results when trying to identify a substance

Match the mixture with the substance// i really need on this guys (it’s a pic btw)