Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Consider the following
1) Synthetic elements are created by humans.
2) Most of the synthetic elements are located in the 7th group of the periodic table.
3) The atoms of some synthetic elements now present on Earth are products of atomic bombs.
Which of the following is/are true about synthetic elements?
1 and 2
2 and 3
1 and 3
All of the above
Consider the following statements and select the correct code.
Assertion (A): In the periodic table of chemical elements, from top to bottom in a group electron affinity will always increase.
Reason (R): The atomic radii generally increase from top to bottom in a group.
Both A and R is individually true, and R is correct explanation of A
Both A and R is individually true, and R is not the correct explanation of A
A is true but R is false
A is false but R is true
Which one of the following is not a periodic property i.e. does not show any trend on moving from one side to the other in the periodic table ?
Atomic size
Valency
Radioactivity
Electronegativity
How many elements are there in the 5th period of the modern periodic table?
2
8
18
3
Which has the highest electron affinity–
F
CI
Br
I
