1. How many different 4 s states does the hydrogen atom have? 10 2 0 8 2. The el
ID: 1398148 • Letter: 1
Question
1.
How many different 4s states does the hydrogen atom have?
10
2
0
8
2.
The element boron has the atomic number Z = 5. What element of the next-larger Z has properties similar to those of boron?
neon
aluminum
carbon
beryllium
3.
How many 3d electrons can an atom have?
10
0
8
4
6
4.
What is the atomic number Z of the element with the electron configuration 1s22s22p63s23p63d4s2?
21
18
9
4
1.
How many different 4s states does the hydrogen atom have?
10
2
0
8
2.
The element boron has the atomic number Z = 5. What element of the next-larger Z has properties similar to those of boron?
neon
aluminum
carbon
beryllium
Explanation / Answer
1)
atomic number of hydrogen is 1 so no 4s state exit
answer = 0 <------answer
2)
aluminium <------answer
both are belong to same group and same number of valency
electrons present in their valency shells these valeny
electrons are responsible for similar properties
------------------
3)
10 <------answer
because d subshell contain 5 orbitals. each orbital can acccomidate 2 electrons , so 5 orbital an accomidate 10 electrons
-------
4)
1s2 2s2 2p6 3s2 3p6 3d1 4s2
2 + 2 +6 + 2 +6 + 1 +2 = 21 <------answer
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