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1. An ion has a net charge of - 3, and 12 electrons, what is its atomic number? What element has that atomic number?

2. An ion of Celsius has a net charge of -5, how many electrons does it have?

3. Some atom has an atomic number of 46, how many electrons does it have if it has a net charge of +2?

4. How many neutrons are in an atom of Helium, and what is its mass number?

5. There are 3 neutrons in an isotope of Helium, what is its mass number?

6. n isotope has 83 neutrons and a mass number of 167, what is its atomic number? What element is defined by that atomic number?

7. What element has 54 neutrons and a mass number of 112?

8. What element has 10 electrons, a net charge of -2?

Sagot :

unknown767

Answer:

19 because it gained 3 electron so 12-3=9 beryllium

2

3 is 46-2=44

4 is 2

5 is 5

6 84 polonium

7

8 oxygen

Explanation:

plz let me know if they are right or wrong:)

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