2C How many valence electrons does the atom have? A. 1 C. 5 B. 3 D. 7 i need help.​

An alcohol thermometer makes use of alcohol's changing in order to measure temperature. as the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)