Question

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Answer 1

The missing information is filled in the below table. To determine the number of protons, neutrons, and electrons in each isotope, we can use the notation
`\(A/Z\, X\)`.

1. Fill in the missing information on the table below.

The atomic number of an element is the number of protons in the nucleus of its atom.

The mass number of an element is the sum of the number of protons and neutrons in the nucleus of its atom.

The number of electrons in an atom is equal to the number of protons when the atom is neutral.

The charge of an atom is equal to the difference between the number of protons and electrons. A positive charge indicates that the atom has more protons than electrons, and a negative charge indicates that the atom has more electrons than protons.

2. Determine the number of protons, neutrons, and electrons in the isotopes below.

To determine the number of protons, neutrons, and electrons in each isotope, we can use the notation
`\(A/Z\, X\)`, where:

-
`\(A\)` is the mass number (sum of protons and neutrons),

-
`\(Z\)` is the atomic number (number of protons),

-
`\(X\)` is the chemical symbol.

1. Fe-56 (Iron-56):

- Mass number
`(\(A\))`: 56

- Atomic number
`(\(Z\))`: 26

- Number of protons
`(\(Z\))`: 26

- Number of neutrons
`(\(A - Z\))`:
`\(56 - 26 = 30\)`

- Number of electrons
`(\(Z\))`: 26

2. Rh-103 (Rhodium-103):

- Mass number
`(\(A\))`: 103

- Atomic number
`(\(Z\))`: 45

- Number of protons
`(\(Z\))`: 45

- Number of neutrons
`(\(A - Z\))`:
`\(103 - 45 = 58\)`

- Number of electrons
`(\(Z\))`: 45

3. Sr-88 (Strontium-88):

- Mass number
`(\(A\))`: 88

- Atomic number
`(\(Z\))`: 38

- Number of protons
`(\(Z\))`: 38

- Number of neutrons
`(\(A - Z\))`:
`\(88 - 38 = 50\)`

- Number of electrons
`(\(Z\))`:38

4. Li-7 (Lithium-7):

- Mass number
`(\(A\))`: 7

- Atomic number
`(\(Z\))`: 3

- Number of protons
`(\(Z\))`: 3

- Number of neutrons
`(\(A - Z\))`:
`\(7 - 3 = 4\)`

- Number of electrons
`(\(Z\))`: 3

5. Bi-209 (Bismuth-209):

- Mass number
`(\(A\))`: 209

- Atomic number
`(\(Z\))`: 83

- Number of protons
`(\(Z\))`: 83

- Number of neutrons
`(\(A - Z\))`:
`\(209 - 83 = 126\)`

- Number of electrons
`(\(Z\))`: 83

These values give you information about the composition of each isotope in terms of protons, neutrons, and electrons.