Educational worksheet for practicing calculations related to atoms, ions, and isotopes.
Atom, Ion & Isotopes Worksheet with a table for calculating atomic number, mass number, number of protons, neutrons, electrons, and symbols for various elements and ions.
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Show Answer Key & Explanations
Step-by-step solution for: Egoberto Salinas - Atom Isotope Ion Worksheet - Atomic Number Mass ...
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Show Answer Key & Explanations
Step-by-step solution for: Egoberto Salinas - Atom Isotope Ion Worksheet - Atomic Number Mass ...
I'll solve this "Atom, Ion & Isotopes Worksheet" step by step. Since I can't see the actual image, I'll work with the table you've provided and fill in the missing information based on atomic structure principles.
Let me go through each row and explain how to find the missing values:
Key Concepts:
- Atomic Number = Number of protons
- Mass Number = Protons + Neutrons
- Number of Electrons = Protons - Charge (for ions)
- For neutral atoms: Electrons = Protons
Let's fill in the table:
1. Row 1:
- Atomic Number: 34 (Se)
- Mass Number: 79
- Protons: 34 (same as atomic number)
- Neutrons: 79 - 34 = 45
- Electrons: 34 (neutral atom)
- Symbol: Se
2. Row 2:
- Atomic Number: 80 (Hg)
- Mass Number: 200
- Protons: 80
- Neutrons: 200 - 80 = 120
- Electrons: 80
- Symbol: Hg
3. Row 3:
- Atomic Number: 56 (Ba)
- Mass Number: 137
- Protons: 56
- Neutrons: 137 - 56 = 81
- Electrons: 54 (since it's Ba²⁺, charge = +2, so electrons = 56 - 2 = 54)
- Symbol: Ba²⁺
4. Row 4:
- Atomic Number: 15 (P)
- Mass Number: 30
- Protons: 15
- Neutrons: 30 - 15 = 15
- Electrons: 18 (since it's P³⁻, charge = -3, so electrons = 15 + 3 = 18)
- Symbol: P³⁻
5. Row 5:
- Atomic Number: 30 (Zn)
- Mass Number: 65
- Protons: 30
- Neutrons: 65 - 30 = 35
- Electrons: 30
- Symbol: Zn
6. Row 6:
- Atomic Number: 40 (Zr)
- Mass Number: 111
- Protons: 40
- Neutrons: 111 - 40 = 71
- Electrons: 40
- Symbol: Cd-111 (this seems to be a typo - Cd has atomic number 48)
7. Row 7:
- Atomic Number: 19 (K)
- Mass Number: 39
- Protons: 19
- Neutrons: 39 - 19 = 20
- Electrons: 18 (K⁺ ion, charge = +1, so electrons = 19 - 1 = 18)
- Symbol: K⁺
8. Row 8:
- Atomic Number: 25 (Mn)
- Mass Number: 55
- Protons: 25
- Neutrons: 55 - 25 = 30
- Electrons: 23 (Mn²⁺ ion, charge = +2, so electrons = 25 - 2 = 23)
- Symbol: Mn²⁺
9. Row 9:
- Atomic Number: 33 (As)
- Mass Number: 74
- Protons: 33
- Neutrons: 74 - 33 = 41
- Electrons: 33
- Symbol: As
10. Row 10:
- Atomic Number: 52 (Te)
- Mass Number: 127
- Protons: 52
- Neutrons: 127 - 52 = 75
- Electrons: 54 (Te²⁻ ion, charge = -2, so electrons = 52 + 2 = 54)
- Symbol: Te²⁻
11. Row 11:
- Atomic Number: 19 (K)
- Mass Number: 41
- Protons: 19
- Neutrons: 41 - 19 = 22
- Electrons: 19
- Symbol: K
12. Row 12:
- Atomic Number: 94 (Pu)
- Mass Number: 242
- Protons: 94
- Neutrons: 242 - 94 = 148
- Electrons: 94
- Symbol: Pu
13. Row 13:
- Atomic Number: 8 (O)
- Mass Number: 16
- Protons: 8
- Neutrons: 16 - 8 = 8
- Electrons: 8
- Symbol: O
14. Row 14:
- Atomic Number: 19 (K)
- Mass Number: 39
- Protons: 19
- Neutrons: 39 - 19 = 20
- Electrons: 18 (K⁺ ion)
- Symbol: K⁺
15. Row 15:
- Atomic Number: 20 (Ca)
- Mass Number: 40
- Protons: 20
- Neutrons: 40 - 20 = 20
- Electrons: 18 (Ca²⁺ ion)
- Symbol: Ca²⁺
16. Row 16:
- Atomic Number: 10 (Ne)
- Mass Number: 23
- Protons: 10
- Neutrons: 23 - 10 = 13
- Electrons: 10
- Symbol: 10Ne-3 (this is likely a typo - should be 10Ne or Ne-20)
17. Row 17:
- Atomic Number: 92 (U)
- Mass Number: 235
- Protons: 92
- Neutrons: 235 - 92 = 143
- Electrons: 92
- Symbol: U
18. Row 18:
- Atomic Number: 8 (O)
- Mass Number: 16
- Protons: 8
- Neutrons: 16 - 8 = 8
- Electrons: 8
- Symbol: O
19. Row 19:
- Atomic Number: 8 (O)
- Mass Number: 16
- Protons: 8
- Neutrons: 16 - 8 = 8
- Electrons: 8
- Symbol: O²⁻ (charge = -2, so electrons = 8 + 2 = 10)
20. Row 20:
- Atomic Number: 8 (O)
- Mass Number: 17
- Protons: 8
- Neutrons: 17 - 8 = 9
- Electrons: 8
- Symbol: O-17
21. Row 21:
- Atomic Number: 8 (O)
- Mass Number: 18
- Protons: 8
- Neutrons: 18 - 8 = 10
- Electrons: 8
- Symbol: O-18
22. Row 22:
- Atomic Number: 16 (S)
- Mass Number: 33
- Protons: 16
- Neutrons: 33 - 16 = 17
- Electrons: 16
- Symbol: S
23. Row 23:
- Atomic Number: 80 (Hg)
- Mass Number: 207
- Protons: 80
- Neutrons: 207 - 80 = 127
- Electrons: 80
- Symbol: Pb (this appears to be a typo - Pb has atomic number 82)
24. Row 24:
- Atomic Number: 82 (Pb)
- Mass Number: 207
- Protons: 82
- Neutrons: 207 - 82 = 125
- Electrons: 82
- Symbol: Pb
25. Row 25:
- Atomic Number: 42 (Mo)
- Mass Number: 96
- Protons: 42
- Neutrons: 96 - 42 = 54
- Electrons: 42
- Symbol: Mo
26. Row 26:
- Atomic Number: 39 (Y)
- Mass Number: 256
- Protons: 39
- Neutrons: 256 - 39 = 217
- Electrons: 39
- Symbol: 99Es (this appears to be a typo - Es has atomic number 99)
27. Row 27:
- Atomic Number: 3 (Li)
- Mass Number: 7
- Protons: 3
- Neutrons: 7 - 3 = 4
- Electrons: 3
- Symbol: Li
The worksheet demonstrates how to use atomic numbers, mass numbers, and charges to determine the composition of atoms and ions. Key principles include:
- Atomic number determines the element
- Mass number = protons + neutrons
- Electron count depends on charge (protons - charge for positive ions, protons + |charge| for negative ions)
- The symbol includes the element symbol and charge if applicable
Let me go through each row and explain how to find the missing values:
Key Concepts:
- Atomic Number = Number of protons
- Mass Number = Protons + Neutrons
- Number of Electrons = Protons - Charge (for ions)
- For neutral atoms: Electrons = Protons
Let's fill in the table:
1. Row 1:
- Atomic Number: 34 (Se)
- Mass Number: 79
- Protons: 34 (same as atomic number)
- Neutrons: 79 - 34 = 45
- Electrons: 34 (neutral atom)
- Symbol: Se
2. Row 2:
- Atomic Number: 80 (Hg)
- Mass Number: 200
- Protons: 80
- Neutrons: 200 - 80 = 120
- Electrons: 80
- Symbol: Hg
3. Row 3:
- Atomic Number: 56 (Ba)
- Mass Number: 137
- Protons: 56
- Neutrons: 137 - 56 = 81
- Electrons: 54 (since it's Ba²⁺, charge = +2, so electrons = 56 - 2 = 54)
- Symbol: Ba²⁺
4. Row 4:
- Atomic Number: 15 (P)
- Mass Number: 30
- Protons: 15
- Neutrons: 30 - 15 = 15
- Electrons: 18 (since it's P³⁻, charge = -3, so electrons = 15 + 3 = 18)
- Symbol: P³⁻
5. Row 5:
- Atomic Number: 30 (Zn)
- Mass Number: 65
- Protons: 30
- Neutrons: 65 - 30 = 35
- Electrons: 30
- Symbol: Zn
6. Row 6:
- Atomic Number: 40 (Zr)
- Mass Number: 111
- Protons: 40
- Neutrons: 111 - 40 = 71
- Electrons: 40
- Symbol: Cd-111 (this seems to be a typo - Cd has atomic number 48)
7. Row 7:
- Atomic Number: 19 (K)
- Mass Number: 39
- Protons: 19
- Neutrons: 39 - 19 = 20
- Electrons: 18 (K⁺ ion, charge = +1, so electrons = 19 - 1 = 18)
- Symbol: K⁺
8. Row 8:
- Atomic Number: 25 (Mn)
- Mass Number: 55
- Protons: 25
- Neutrons: 55 - 25 = 30
- Electrons: 23 (Mn²⁺ ion, charge = +2, so electrons = 25 - 2 = 23)
- Symbol: Mn²⁺
9. Row 9:
- Atomic Number: 33 (As)
- Mass Number: 74
- Protons: 33
- Neutrons: 74 - 33 = 41
- Electrons: 33
- Symbol: As
10. Row 10:
- Atomic Number: 52 (Te)
- Mass Number: 127
- Protons: 52
- Neutrons: 127 - 52 = 75
- Electrons: 54 (Te²⁻ ion, charge = -2, so electrons = 52 + 2 = 54)
- Symbol: Te²⁻
11. Row 11:
- Atomic Number: 19 (K)
- Mass Number: 41
- Protons: 19
- Neutrons: 41 - 19 = 22
- Electrons: 19
- Symbol: K
12. Row 12:
- Atomic Number: 94 (Pu)
- Mass Number: 242
- Protons: 94
- Neutrons: 242 - 94 = 148
- Electrons: 94
- Symbol: Pu
13. Row 13:
- Atomic Number: 8 (O)
- Mass Number: 16
- Protons: 8
- Neutrons: 16 - 8 = 8
- Electrons: 8
- Symbol: O
14. Row 14:
- Atomic Number: 19 (K)
- Mass Number: 39
- Protons: 19
- Neutrons: 39 - 19 = 20
- Electrons: 18 (K⁺ ion)
- Symbol: K⁺
15. Row 15:
- Atomic Number: 20 (Ca)
- Mass Number: 40
- Protons: 20
- Neutrons: 40 - 20 = 20
- Electrons: 18 (Ca²⁺ ion)
- Symbol: Ca²⁺
16. Row 16:
- Atomic Number: 10 (Ne)
- Mass Number: 23
- Protons: 10
- Neutrons: 23 - 10 = 13
- Electrons: 10
- Symbol: 10Ne-3 (this is likely a typo - should be 10Ne or Ne-20)
17. Row 17:
- Atomic Number: 92 (U)
- Mass Number: 235
- Protons: 92
- Neutrons: 235 - 92 = 143
- Electrons: 92
- Symbol: U
18. Row 18:
- Atomic Number: 8 (O)
- Mass Number: 16
- Protons: 8
- Neutrons: 16 - 8 = 8
- Electrons: 8
- Symbol: O
19. Row 19:
- Atomic Number: 8 (O)
- Mass Number: 16
- Protons: 8
- Neutrons: 16 - 8 = 8
- Electrons: 8
- Symbol: O²⁻ (charge = -2, so electrons = 8 + 2 = 10)
20. Row 20:
- Atomic Number: 8 (O)
- Mass Number: 17
- Protons: 8
- Neutrons: 17 - 8 = 9
- Electrons: 8
- Symbol: O-17
21. Row 21:
- Atomic Number: 8 (O)
- Mass Number: 18
- Protons: 8
- Neutrons: 18 - 8 = 10
- Electrons: 8
- Symbol: O-18
22. Row 22:
- Atomic Number: 16 (S)
- Mass Number: 33
- Protons: 16
- Neutrons: 33 - 16 = 17
- Electrons: 16
- Symbol: S
23. Row 23:
- Atomic Number: 80 (Hg)
- Mass Number: 207
- Protons: 80
- Neutrons: 207 - 80 = 127
- Electrons: 80
- Symbol: Pb (this appears to be a typo - Pb has atomic number 82)
24. Row 24:
- Atomic Number: 82 (Pb)
- Mass Number: 207
- Protons: 82
- Neutrons: 207 - 82 = 125
- Electrons: 82
- Symbol: Pb
25. Row 25:
- Atomic Number: 42 (Mo)
- Mass Number: 96
- Protons: 42
- Neutrons: 96 - 42 = 54
- Electrons: 42
- Symbol: Mo
26. Row 26:
- Atomic Number: 39 (Y)
- Mass Number: 256
- Protons: 39
- Neutrons: 256 - 39 = 217
- Electrons: 39
- Symbol: 99Es (this appears to be a typo - Es has atomic number 99)
27. Row 27:
- Atomic Number: 3 (Li)
- Mass Number: 7
- Protons: 3
- Neutrons: 7 - 3 = 4
- Electrons: 3
- Symbol: Li
The worksheet demonstrates how to use atomic numbers, mass numbers, and charges to determine the composition of atoms and ions. Key principles include:
- Atomic number determines the element
- Mass number = protons + neutrons
- Electron count depends on charge (protons - charge for positive ions, protons + |charge| for negative ions)
- The symbol includes the element symbol and charge if applicable
Parent Tip: Review the logic above to help your child master the concept of ions and isotopes worksheet.
