Question

mnemonics for remembering elements from atomic no. 21 to 30​

Answer 1

*Sc* Science

*Ti* Teacher

*V* Vipin

*Cr* Criplani

*Mn* Monday

*Fe* Friday

*Co* Ko

*Ni* Naha

*Cu* ke

*Zn* Zate hain

Explanation:

Now, Trick to remember atomic mass of 21 to 30 elements :

Remember this magic nos. : 3, 4, 5, 4, 5, 4, 5, 3, 6, 5

(Something like this : 3, 3 times 45, 3, 6, 5)

Trick : Double of Atomic number + Magic no.

Elements Atomic no. Atomic mass

Scandium(21) - At mass : Double of 21(i.e 42) + 3 = 45

Titanium(22) - At mass : Double of 22(i.e 44) + 4 = 48

Vanadium(23) - At mass : Double of 23(i.e 46) + 5 = 51

Chromium(24) - At mass : Double of 24(i.e 48) + 4 = 52

Manganese(25) - At mass : Double of 25(i.e 50) + 5 = 55

Iron(26) - At mass : Double of 26(i.e 52) + 4 = 56

Cobalt(27) - At mass : Double of 27(i.e 54) + 5 = 59

Nickel(28) - At mass : Double of 28(i.e 56) + 3 = 59

Copper(29) - At mass : Double of 29(i.e 58) + 6 = 64

Zinc(30) - At mass : Double of 30(i.e 60) + 5 = 65

Answer 2

Answer:

here is ur answer mate.,