Answer:
option 1 = 1s2 2s2 2p6 3s2 3p6 4s2 3d2
Explanation:
According to the Aufbau principal in ground state of elements electron first occupy the lower energy level then fill the higher energy levels. We know that there four subshells s, p, d and f. The maximum number of electrons in these subshells can be calculated by following formula:
2 (2l +1 )
and l = 0,1,2,3,....
maximum numbers of electrons in s subshell are,
l=0
2 ( 2(0) + 1)
2
so maximum electrons in s subshell are 2.
maximum numbers of electrons in p subshell are,
l = 1
2 ( 2(1) + 1)
2( 2 + 1)
6
so maximum electrons in p subshell are 6.
maximum numbers of electrons in d subshell are,
l = 2
2 ( 2(2) + 1)
2( 4 + 1)
10
so maximum electrons in d subshell are 10.
maximum numbers of electrons in f subshell are,
l = 3
2 ( 2(3) + 1)
2( 6 + 1)
14
so maximum electrons in f subshell are 14.
Electron first fill 1s subshell then 2s subshell and in this way they goes to higher energy levels.
Electronic configuration of titanium:
1s2 2s2 2p6 3s2 3p6 4s2 3d2
Properties and uses of Titanium.
1. Titanium is silver color transition metal.
2. Its atomic number is 22.
3. Its atomic weight is 47.86 u.
4. It has low density high strength.
5. Its density is 4.506 g/cm3.
6. It is present in middle of periodic table and the member of group 4.
7. It is used to make the alloy and these alloys are used in aerospace industry.
8. These alloy are also used in bicycles, golf club and laptops.
Answer:
the correct answer is the 1st option
1s22s22p63s23p64s23d2
