You are walking on the school playground and notice an unusual object mostly buried. You dig it up and clean it off and discover
it is a mineral! You want to try to identify which mineral it is.
What different observations can you make to help you determine your unknown mineral?
What different observations can you make to help you determine your unknown mineral?
2 answers:
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<u>Answer:</u> The isotopic symbol of barium is and that of strontium is
<u>Explanation:</u>
Nuclear fission reactions are defined as the reactions in which a heavier nuclei breaks down in two or more smaller nuclei.
In a nuclear reaction, the total mass and total atomic number remains the same.
- For the given fission reaction:
- <u>To calculate A:</u>
Total mass on reactant side = total mass on product side
235 + 1 = A + 94 + 3
A = 139
- <u>To calculate Z:</u>
Total atomic number on reactant side = total atomic number on product side
92 + 0 = Z + 36 + 0
Z = 56
The isotopic symbol of barium is
- For the given fission reaction:
- <u>To calculate A:</u>
Total mass on reactant side = total mass on product side
235 + 1 = A + 143 + 3
A = 90
- <u>To calculate Z:</u>
Total atomic number on reactant side = total atomic number on product side
92 + 0 = Z + 54 + 0
Z = 38
The isotopic symbol of strontium is
Hence, the isotopic symbol of barium is and that of strontium is
Answer :
Explanation :
The aluminium and fluorine react to give ionic compound aluminium fluoride.
Aluminium has 1 valence electrons in their shell and fluorine has 7 valence electrons in their shell.
For the complete octet, both aluminium and fluorine exchange valence electrons to form an ionic compound.
The aluminium donates its three valence electrons to three fluorine atoms and they form one and three
ions.
Electron transfer image is shown below.
