Which characteristic of an atom always varies among atoms of different elements

How many pi bonds are there in NO3-

Could a mixture be made up of only one element and no compounds

Has a tomato been proven as a fruit I think so

What shape would seh2 have? draw the molecule

12.5M AgNO3 is made using 3.5L H2O. How many grams AgNO3 are needed to produce the solution?

How many moles of water are made from complete reaction of 1.4 moles of hydrogen gas? Given the reaction: 2H2 + O2 → 2H2O

A scientific law is 1. A university accepted conclusion based on testing 2. Always changing a new evidence is presented 3. Based on new evolving theories 4. Often debated in the scientific community 5. One step toward forming a theory

12 Two molecules of HBr collide and then form H2 and Br2. During the collision, the bonds in the HBr molecules are

If the two charges represented in the figure were brought near each other, they would a. have no effect on each other. b. repel each other. c. cause static discharge. d. attract each other.

A gas tank holds 20000 liters at 850 torr. If the temperature remains constant, what will the volume, in L, of the gas be at standard pressure, 760 torr?