QuestionIdentify the correct isotope symbol from the options: (a) , (b) , (c) , (d) .
Studdy Solution
STEP 1
Assumptions1. The isotope symbols are represented as where - Z is the atomic number (number of protons)
- A is the mass number (number of protons + number of neutrons)
- X is the chemical symbol. The atomic number Z and the chemical symbol X should match according to the periodic table.
3. The mass number A should be greater than or equal to the atomic number Z, as it includes both protons and neutrons.
STEP 2
We need to check each option to see if it meets the criteria outlined in the assumptions.(a) For this isotope, the atomic number Z is71 and the chemical symbol is Br. According to the periodic table, the atomic number for Br (Bromine) is35, not71. Therefore, this isotope symbol is incorrect.
STEP 3
(b) For this isotope, the atomic number Z is27 and the chemical symbol is Co. According to the periodic table, the atomic number for Co (Cobalt) is27, which matches. However, the mass number A is24, which is less than the atomic number Z. This is not possible as the mass number should be greater than or equal to the atomic number. Therefore, this isotope symbol is incorrect.
STEP 4
(c) For this isotope, the atomic number Z is52 and the chemical symbol is Te. According to the periodic table, the atomic number for Te (Tellurium) is52, which matches. Also, the mass number A is105, which is greater than the atomic number Z. Therefore, this isotope symbol is correct.
STEP 5
(d) For this isotope, the atomic number Z is20 and the chemical symbol is Sc. According to the periodic table, the atomic number for Sc (Scandium) is21, not20. Therefore, this isotope symbol is incorrect.
The correct isotope symbol is (c) .
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