Situation 1 Mass number = 35
No. of protons = 17
Net charge = -1

3.What is the atomic number?
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4.How many neutrons are there?
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5.How many electrons are there?
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6.What type of atom is it?Immersive Reader
(1 Point)

neutral

cation

anion

Situation 2
Number of protons = 35
Number of neutrons = 46
Net charge = -1
7.What is its atomic number?
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8.What is its mass number?
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9.How many electrons are there?
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10.What type of atom is it?Immersive Reader
(1 Point)

neutral

cation

anion

Situation 3
Atomic number = 37
Mass number = 85
Number of electrons = 36
11.How many protons are there?
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12.How many neutrons are there?
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13.What is its net charge?
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14.What type of atom is it?Immersive Reader
(1 Point)

neutral

cation

anion

Situation 4
Mass number = 11
Number of neutrons = 6
Net charge = +3
15.What is its atomic number?
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16.How many protons are there?
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17.How many electrons are there?
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18.What type of atom is it?Immersive Reader
(1 Point)

neutral

cation

anion

3. 17

4. 18

5. 10

6. Cation

7. 35

8. 81

9. 36

10. Anion

11. 37

12. 48

13. +1

14. Cation

15. 5

16. 5

17. 2

18. Cation

Explanation:

Situation 1

The mass number = 35 = The sum of the protons and the neutrons in an atom

The number of protons = 17

The net charge = 1

3. The atomic  number = The number of proton = 17

4. The number of neutrons = Mass number - Atomic number

∴ The number of neutrons = 35 - 17 = 18

5. Given that the net charge of the atom = +1, the number of electrons in the atom is 1 less than the number of protons

Therefore, the number of electrons = 11 - 1 = 10

6. Positively charged ions are called a cation

The atom is a positively charged and it is therefore it is a cation

Situation 2

The number of protons =  35

The number of neutrons = 46

The net charge = -1

7. The atomic number = The number of protons = 35

8. The mass number = The number of protons + The number of neutrons

∴ The mass number = 35 + 46 = 81

9. The number of electrons = The number of protons + 1

∴ The number of electrons = 35 + 1 = 36

10. The type of atom is an anion

Situation 3

Atomic number = 37

Mass number = 85

Number of electrons = 36

11. The number of protons = The atomic number = 37

12. The number of neutrons = The mass number - The atomic number

∴ The number of neutrons = 85 - 37 = 48

13. The net charge = The atomic number - The number of electrons

∴ The net charge = 37 - 36 = +1

14. Given that the net charge = +1, the type of atom is a cation

Situation 4

Mass number = 11

Number of neutrons = 6

Net charge = +3

15. The atomic number = The mass number - The number of neutrons

∴ The atomic number = 11 - 6 = 5

16. The number of protons = The atomic number = 5

17. Given that the net charge is +3, we have;

The number of electrons = The number of protons - The net charge

∴ The number of electrons = 5 - (+3) = 2

18. The type of atom with a net positive charge (+3) is a cation

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