kimvilla4life
Answered

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need help with 22 and 24
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Need Help With 22 And 24 class=

Sagot :

Answer:

22:

Formular:

[tex]atomic \: mass = \frac{ \sum(isotopic \: mass \times \%abundance)}{100} \\ [/tex]

substitute:

[tex]atomic \: mass = \frac{(23.985 \times 78.70) + (24.986 \times 10.13) + (25.983 \times 11.17)}{100} \\ \\ = \frac{(1887.620) + (253.108) + (290.230)}{100} \\ \\ = \frac{2430.958}{100} \\ \\ { \boxed{ \boxed{average \: atomic \: mass = 24.3 \: amu}}}[/tex]

23:

Same element is represented by same number of protons.

Answer:

6 protons. 6 protons

7 neutrons. 8 neutrons

6 electrons. 6 electrons

Note: Atoms with same proton number but different mass number are called isotopes

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