Question
Question: Which of the following is true about the element 33As according to Modern periodic table :...
Which of the following is true about the element 33As according to Modern periodic table :
A
It is a 5th period element.
B
It is a p-block element.
C
It belongs to 16th group.
D
It is one among typical elements.
Answer
It is a p-block element.
Explanation
Solution
Electron configuration is [Ar]18 3d10 4s2 4p3 . As last
electron enters in p-subshell it is p-block element and thus its group number is equal to 10 + 5 = 15. As principal quantum number of valence shell is 4, so it is 4th period element.