Answer:
OXYGEN
I don't know what to say for the 20 character limit
-Are the most used in daily life and basic human needs
(such as oxygen,nitrogen,carbon, etc)
Answer:
d) Nucleus of the element does not change during the react
hope it helps (^^)
# Cary on learning
I believe you mean what amount of O2 contains 1.8 x 10^22 molecules.
Solution: Divide your number of molecules by the number of molecules in one mole (6.02 x l0^23)
02989 moles. Rounded to the nearest hundredths,.<span>0299</span>
If you look at the periodic table you will see the atomic number (the smaller number) which is 3. that identifies how many protons there are. since the lithium is neutral that means there’s a same amount of electrons.
therefore there’s 3 electrons and 3 protons