Question

for the questions below determine if the particle that is described in an atom or an ion. in the space that says, “charge”, write either “positive”, “negative”, or “no charge”. then indicate whether the particle is an “atom” or an “ion”. 5. a particle of oxygen that contains 8 protons and 8 electrons. charge ______ is this an atom or an ion? ____ 6. a particle of fluorine that contains 9 protons and 10 electrons. charge ____ is this an atom or an ion? ____ 7. a particle of calcium that contains 20 protons and 18 electrons. charge ____ is this an atom or an ion? ____ 8. a particle of uranium that contains 92 protons and 88 electrons. charge ____ is this an atom or an ion? ____ for each of the questions below fill in the atomic number, mass number, and write the proper name (e.g. hydrogen - 2) for each isotope. 9. carbon (6 protons, 8 neutrons) atomic number ____ mass number ____ name ____ 10. argon (18 protons, 22 neutrons) atomic number ____ mass number ____ name ____ 11. silver (47 protons, 61 neutrons) atomic number ____ mass number ____ name ____ 12. protactinium (91 protons, 142 neutrons) atomic number ____ mass number ____ name ______

Explanation:

Step1: Recall charge - determination rule

Charge = Number of protons - Number of electrons. An atom has equal number of protons and electrons, while an ion has unequal number of protons and electrons. Atomic number = Number of protons, Mass number=Number of protons + Number of neutrons.

Step2: Solve question 5

Charge = 8 - 8 = 0. Since number of protons = number of electrons, it is an atom.

Step3: Solve question 6

Charge = 9 - 10=- 1. Since number of protons $
eq$ number of electrons, it is an ion.

Step4: Solve question 7

Charge = 20 - 18 = 2. Since number of protons $
eq$ number of electrons, it is an ion.

Step5: Solve question 8

Charge = 92 - 88 = 4. Since number of protons $
eq$ number of electrons, it is an ion.

Step6: Solve question 9

Atomic number = 6, Mass number = 6 + 8=14, Name: carbon - 14

Step7: Solve question 10

Atomic number = 18, Mass number = 18+22 = 40, Name: argon - 40

Step8: Solve question 11

Atomic number = 47, Mass number = 47+61 = 108, Name: silver - 108

Step9: Solve question 12

Atomic number = 91, Mass number = 91 + 142=233, Name: protactinium - 233

Answer:

1. Charge: no charge, Is this an atom or an ion?: atom
2. Charge: negative, Is this an atom or an ion?: ion
3. Charge: positive, Is this an atom or an ion?: ion
4. Charge: positive, Is this an atom or an ion?: ion
5. Atomic number: 6, Mass number: 14, Name: carbon - 14
6. Atomic number: 18, Mass number: 40, Name: argon - 40
7. Atomic number: 47, Mass number: 108, Name: silver - 108
8. Atomic number: 91, Mass number: 233, Name: protactinium - 233