Answer:
B. The principal quantum number (n) is 6, the angular momentum quantum number (ell) is 2, and there are 5 electrons in the subshell.
Explanation:
Given;
electronic configuration of 6d⁵
where;
6 in the configuration shows that, the principal quantum number (n) is 6
d is the subshell
d orbital has angular momentum quantum number (l) of 2
s orbital, l = 0
p orbital, l = 1
d orbital, l = 2
f orbital, l = 3
5 in the configuration means that there are 5 electrons in the subshell
Therefore, 6d⁵ symbol means that "The principal quantum number (n) is 6, the angular momentum quantum number (ell) is 2, and there are 5 electrons in the subshell".
In
Methyl Amine the Nitrogen atom is attached to two Hydrogen Atoms and one Methyl (CH₃-) group. From
Lewis structure it is shown that the Nitrogen atom also contains a
lone pair of electron.
So,
According to
Valence Shell Electron Pair Repulsion (VSEPR)
Theory, those central atoms which have four electron pairs and all of them are bonding electron pairs gives
Tetrahedral Geometry.
Methylamine also contains four electron pairs, but out of four only
three are bonding pair electrons and
one lone pair electron. Now, due to presence of lone pair of electron (which has
greater repulsion effect than bonding electron pair) the bond angle between H-N-H will decrease from
109° to 107° and results in the formation of <span>
Trigonal Pyramidal geometry as shown below,</span>
Six hours and forty minutes .
1) State the chemical reaction
4M + O2 ---> 2M2O
2) State the molar ratios
4 mol M : 1 mol O2 : 2 mol M2O
3) Calculate the number of moles of M2O produced
4 mol M / 2 mol M2O = 2 mol M / x => x = 2 mol M * 2 mol M2O / 4 mol M
=> x = 1 mol M2O
4) Calculate the molar mass of M2O
molar mass = mass in grams / number of moles = 62.0 g / 1 mol = 62.0 g/mol
5) Calculate the atomic mass of M
molar mass of M2O = 2 * atomic mass of M + atomic mass of O =>
62.0 = 2 * atomic mass of M + 16
=> atomic mass of M = [62.0 - 16] / 2 = 23
6) Compare that atomic mass with the atomic masses of the metals in the periodic table.
You will find that 23 is the atomic mass of sodium.
Answer: sodium