What is the symbol for the element iron ?
A.Al `" "` B.C `" "` C.Ne `" "` D.Fe

Make correct statements by filling in the symbols ⊂ or ⊄ in the blank spaces : { a, b, c } . . . { b, c, d }

indicate the number of unpaired electrons in (a ) p , (b ) Si , (c ) Cr (d ) fe and (e ) kr .

In the following, state whether A = B or not: A = { a, b, c, d } B = { d, c, b, a }

If the number of the elements of ordered pairs A xx A is 16 and (a, a) (b, a) (a,c) (d,d) are elements of A xx A then find A

A B C D E is pentagon, prove that vec A B + vec B C + vec C D + vec D E+ vec E A = vec0 vec A B+ vec A E+ vec B C+ vec D C+ vec E D+ vec A C=3 vec A C

Let A={x : x is a natural number}, B ={x : x is an even natural number} C={x : x is an odd natural number and D={x : x is a prime number} Find A cap B, A cap C, A cap D, B cap C, B cap D and C cap D .