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3 years ago

Enter the appropriate symbol for an isotope of calcium-42 corresponding to the isotope notation AZX

2 answers:

3 0

40 20Ca this is the appropriate symbol for an isotope of calcium-42 corresponding to the isotope notation AZX

Evgesh-ka [11]3 years ago

3 0

Answer: $_{20}^{42}\textrm{Ca}$

Explanation:

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

Given mass number of calcium= 42

Atomic number is defined as the number of protons or number of electrons that are present in an atom.

Atomic number = Number of electrons = Number of protons

General representation of an element is given as: $_Z^A\textrm{X}$

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

Calcium is the 20th element of the periodic table with atomic number of 20 and is written as $_{20}^{42}\textrm{Ca}$

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Using the following standard reduction potentials, Fe3+(aq) + e- → Fe2+(aq) E° = +0.77 V Ni2+(aq) + 2 e- → Ni(s) E° = -0.23 V ca

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