Which element has only two half filled orbitals in the 3D sub level ?
ANSWER:
Titanium
Number of moles :
n = mass solute / molar mass
n = 20 / 18
n = 1.111 moles
Therefore:
Molarity = moles solute / volume
Molarity = 1.111 / 30 => 0.37 M
<span>19.992*0.9048+20.993*0.0027+21.991+0.0925 = </span><span> 20.1797 amu (C)</span>
A beta particle is an electron and it has a -1 charge and zero mass.
Beta decay by
emitting an electron is called as β⁻
decay. When this happens, a neutron of the element converts into a proton by
emitting an electron. Hence, the mass of daughter nucleus is same as parent
atom but atomic number/number of protons is higher by 1 than atomic number of
parent atom.
In a β⁻ decay, the symbol is used as ₋₁⁰β or ₋₁⁰e.
-1 is for charge
<span> 0 is for the mass of the particle
</span>
