B, c, o, f, and n are p-block elements. what is the correct order of reactivity of these elements (from greatest to least)?

The order of reactivity will be F > O > N > C > B.

Explanation:

Reactivity of an element is defined as the tendency for it to gain or loose electrons easily.

From the given elements, all are non-metals except boron.

Boron is a metalloid and it does not attract or loose electrons easily. Hence, it is the least reactive element.

Reactivity of non-metals increases across a period because of the decrease in size and electrons are more attracted towards the nucleus and hence, can gain electrons easily. Therefore, the most reactive metal will be fluorine.

Hence, the order of reactivity will be F > O > N > C > B.

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally