Question

Write the appropriate symbol for each of the following isotopes: (a) Z 11, A 23; (b) Z= 28, A= 64; (c) Z= 50, A =115; (d) Z= 20, A= 42.

Answer 1

(a)
`^(23)_(11)Na`

(b)
`^(64)_(28)Ni`

(c)
`^(115)_(50)Sn`

(d)
`^(42)_(20)Ca`

Step-by-step explanation:

Hello,

In this case, Z stands for the isotope's atomic number and A for the isotope's atomic mass, in such a way, looking for each isotope one concludes that the proper symbol, in the form of
`^(A)_(Z)Element` turn out being:

(a)
`^(23)_(11)Na`

(b)
`^(64)_(28)Ni`

(c)
`^(115)_(50)Sn`

(d)
`^(42)_(20)Ca`

Best regards.

Answer 2

Explanation:

Z = atomic mass of the element and , A = atomic mass of the element .

a) Z = 11, A = 23

Element = Sodium

symbol: ²³₁₁Na .

b) Z = 28, A = 64

Element = Nickel

symbol: ⁶⁴₂₈Ni .

c) Z = 50, A = 115

Element = tin

symbol: ¹¹⁵₅₀Sn .

d) Z = 20, A = 42

Element = Calcium

symbol: ⁴²₂₀Ca .