This can be explained by the periodic trend that atomic size decreases from left to right in a given period. This is due to the effective nuclear charge increase, or how much more the nucleus pulls in on the electrons. Therefore Sodium (Na) has the largest atomic radius.
[Ne]3s^23p^6 ( answer D) represent a sample of an octet. Octet is the tendency of an atom to have eight electrons in the valence shell. [Ne]3s^2 3p^6 is an octet since its valence electron that is3s^23p^6 has eight electrons.
The sublevel designation=6f
The allowed values of the magnetic quantum number are: ml=−3,−2,−1,0,+1,+2,+3
The number of orbitals=7
How are these calculated?
- We are given values for the principal and orbital angular momentum quantum numbers: n=6 ,l=3
- The value of n tells us the shell number. The value of l tells us the type of atomic orbital, which here is an "f" orbital. Therefore, the subshell (sublevel) designation is:6f
- For this subshell the allowed values of the magnetic quantum number are: ml=−3,−2,−1,0,+1,+2,+3
- Each value of ml represents one orbital that holds two electrons. Therefore, we can conclude that there are seven orbitals present at the "6f" subshell, so it has a degeneracy of seven.
What are quantum numbers?
- Quantum numbers are used to describe where around a nucleus a particular electron can be found.
- In any given atom, each electron can be described by four quantum numbers.
- These are n,l,m1,ms
- The values that each number can be are based on a set of rules.
To know more about quantum numbers, refer:
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Answer:
D. The coefficients tell the ratio of moles of reactants used in the reaction
Explanation:
The molar ratio is central to all stoichiometric calculations.
To get the mass of Compound B that reacts with compound A, you must
- Convert the mass of A to moles
- Use the molar ratio from the balanced equation to find the moles of B
- Convert moles of B to grams.
You must get over the "mole hill."