1.How many electrons of an Ar atom have angular momentum quantum number l = 0 at
ID: 1010943 • Letter: 1
Question
1.How many electrons of an Ar atom have angular momentum quantum number l = 0 at ground state? Type in only the number in Arabic for your answer.
2."No two electrons in an atom can have the same four quantum numbers" is a statement called
i.the Pauli exclusion principle.
ii.Bohr's rule.
iii.Hund's rule.
iv.De Broglie's relation.
v.Dalton's electron theory.
3.What is the wavelength of radiation that has a frequency of 6.912x1014 sec-1?
1.447x10-15 nm
4.34x102 nm
2.304x106 nm
2.074x1023 nm
4.34x10-7 nm
4.QUESTION 9 How many orbitals are allowed in a subshell if the angular momentum quantum number for electrons in that subshell is 3?
1 3, 5 7, 9
5.A possible set of quantum numbers for the last electron added to complete an atom of germanium in its ground state is
I. n l ml s
4 0 0 +1/2
II. n l ml s
3 0 1 -1/2
III.n l ml s
4 1 -1 +1/2
IV.n l ml s
3 1 +1 -1/2
V. n l ml s
4 2 2 +1/2
6.How many unpaired electrons does an atom of sulfur have at a ground state? 0, 1, 2, 3, 4
7.What is the energy in joules of a mole of photons associated with visible light of wavelength 486.1 nm? 6.46x10-16 J 6.46x10-25 J 2.46x105 J 12.4 kJ 2460 kJ
8.Which is the correct electron configuration of a Cu atom at ground state?
[Ar]4s23d9
[Ar]5s14d10
[Ar]4s13d10
[Ar]4s23d10
9.Complete this sentence: Atoms emit visible and ultraviolet light as electrons jump from lower energy levels to higher levels.
as photons jump from lower energy levels to higher levels.
as electrons jump from higher energy levels to lower levels.
as photons jump from higher energy levels to lower levels.
as electrons move about the atom within an orbit.
Explanation / Answer
1.
electronic configuration of Ar = 1s2 2s2 2p6 3s2 3p6
l= 0 means s orbital
there are 6 electron in s orbital that is in l=0
Answer: 6
2.
Answer:
i.the Pauli exclusion principle.
I am allowed to answer only 1 question at a time
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