Answer: Yes
Explanation:
On the periodic table, you can find the element symbol, name, atomic number, and atomic mass. Just knowing the atomic mass and atomic number can give you the amount of neutrons. The atomic number states the amount of protons. The atomic mass is proton+neutron. Knowing this, you can subtract the atomic mass by the atomic number to get neutron.
Example: Carbon
Atomic number: 6
Atomic mass: 12.011 or 12
12-6=6 [Atomic mass - Atomic number]
There are 6 neutrons in Carbon.
Answer:
(C) Both of these
Explanation:
A beam of electrons has both of these Wave properties and Particle properties.
2Al₂O₃ = 4Al + 3O₂
M(A₂O₃)=101.96 g/mol
m(Al₂O₃)=250 g
n(O₂)=3m(Al₂O₃)/{2M(Al₂O₃)}
n(O₂)=3*250/{2*101.96}=3.678 mol
It seems like the answer is C, you really just need to use the process of elimination.
