GIVING BRAINLIEST What is an atom's mass number?

○ Number of neutrons
○ Number of electrons
○ Number of protons
○ Number of protons plus number of neutrons

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit