Atomic Structure: Isotopes & Ions Quiz

Submit

2. Which is the correct symbol for the element with 8 protons and 10 electrons?

N3-

O2-

O3-

F-

The correct symbol for the element with 8 protons and 10 electrons is O2-. This is because oxygen (O) has 8 protons in its nucleus, and in order to have a charge of -2, it gains 2 extra electrons. Therefore, the symbol O2- represents an oxygen ion with a charge of -2.

Explanation

The correct symbol for the element with 8 protons and 10 electrons is O2-. This is because oxygen (O) has 8 protons in its nucleus, and in order to have a charge of -2, it gains 2 extra electrons. Therefore, the symbol O2- represents an oxygen ion with a charge of -2.

3. How do I form Li+?

Add one electron

Remove one proton

Remove one electron

Add one neutron

How do you remove protons or neutrons from the nucleus? That requires a HUGE HUGE amount of energy..

Explanation

How do you remove protons or neutrons from the nucleus? That requires a HUGE HUGE amount of energy..

4. Which is the correct symbol for an O atom with 8 protons, 9 neutrons and 8 electrons?

16 O 8

17 O 8

18 O 8

18 O 9

The symbol "17 O" represents an oxygen atom with 8 protons, 9 neutrons, and 8 electrons. The atomic number of an element indicates the number of protons in its nucleus, and in this case, it is 8. The mass number of an element is the sum of its protons and neutrons, and in this case, it is 17. Therefore, the correct symbol for an oxygen atom with these characteristics is "17 O".

Explanation

The symbol "17 O" represents an oxygen atom with 8 protons, 9 neutrons, and 8 electrons. The atomic number of an element indicates the number of protons in its nucleus, and in this case, it is 8. The mass number of an element is the sum of its protons and neutrons, and in this case, it is 17. Therefore, the correct symbol for an oxygen atom with these characteristics is "17 O".

5. Cu2+ and Zn2+ are examples of ________.

Anions

Cations

Isotopes

Molecules

Cu2+ and Zn2+ are examples of cations because they are positively charged ions. Cations are formed when an atom loses one or more electrons, resulting in a net positive charge. In the case of Cu2+ and Zn2+, they have lost two electrons each, giving them a 2+ charge. Anions, on the other hand, are negatively charged ions formed when an atom gains one or more electrons. Isotopes refer to different forms of an element with the same number of protons but different numbers of neutrons. Molecules are formed when two or more atoms chemically bond together.

Explanation

Cu2+ and Zn2+ are examples of cations because they are positively charged ions. Cations are formed when an atom loses one or more electrons, resulting in a net positive charge. In the case of Cu2+ and Zn2+, they have lost two electrons each, giving them a 2+ charge. Anions, on the other hand, are negatively charged ions formed when an atom gains one or more electrons. Isotopes refer to different forms of an element with the same number of protons but different numbers of neutrons. Molecules are formed when two or more atoms chemically bond together.

6.

Which particle is an atom of a noble gas?

Noble gases have full electronic configuration. In this case, M has an electronic configuration of 2.8.

Explanation

Noble gases have full electronic configuration. In this case, M has an electronic configuration of 2.8.

Submit

7. Fe 2+ and Fe3+ are different __________.

Ions

Isotopes

Elements

Atoms

Fe2+ and Fe3+ are different ions because they have different charges. Fe2+ has a positive charge of +2, while Fe3+ has a positive charge of +3. This difference in charge is due to the different number of electrons present in each ion. Therefore, Fe2+ and Fe3+ are distinct and separate entities in terms of their chemical properties and behavior.

Explanation

Fe2+ and Fe3+ are different ions because they have different charges. Fe2+ has a positive charge of +2, while Fe3+ has a positive charge of +3. This difference in charge is due to the different number of electrons present in each ion. Therefore, Fe2+ and Fe3+ are distinct and separate entities in terms of their chemical properties and behavior.

8. N3- has __________.

7 protons and 4 electrons

7 protons and 10 electrons

7 protons and 11 electrons

8 protons and 11 electrons

p = e ; the number of protons equates the number of electrons when the atom is electrically neutral. In this case, 3 electrons was added to give nitrogen the overall -3 charge.

Explanation

p = e ; the number of protons equates the number of electrons when the atom is electrically neutral. In this case, 3 electrons was added to give nitrogen the overall -3 charge.

9. The table shows the atomic structure of 6 particles, represented by the letters L to Q. The particles are atoms or ions. The letters are not the symbol of the elements.

Which 2 particles are ions?

Yes they have the same number of protons but different number of electrons.

Explanation

Yes they have the same number of protons but different number of electrons.

Submit

10. How many electrons does Li+ atom have?

0

1

2

3

Li+ is a lithium ion that has lost one electron. Since lithium has 3 electrons in its neutral state, when it loses one electron to form the Li+ ion, it is left with 2 electrons. Therefore, the correct answer is 2.

Explanation

Li+ is a lithium ion that has lost one electron. Since lithium has 3 electrons in its neutral state, when it loses one electron to form the Li+ ion, it is left with 2 electrons. Therefore, the correct answer is 2.

11.

Which two particles are isotopes of the same element?

Isotopes are atoms of the same element that have different numbers of neutrons. In this case, the particles L and P are indicated as isotopes of the same element. The use of the word "and" and the symbol "&" between L and P suggests that both particles are isotopes of the same element.

Explanation

Isotopes are atoms of the same element that have different numbers of neutrons. In this case, the particles L and P are indicated as isotopes of the same element. The use of the word "and" and the symbol "&" between L and P suggests that both particles are isotopes of the same element.

Submit

12.

Which two particles are an atom and an ion of the same element?

N and O have the same proton number belonging to Magnesium.If u chose L and P, they are an example of an isotope.

Explanation

N and O have the same proton number belonging to Magnesium.If u chose L and P, they are an example of an isotope.

Submit

13. How many protons, neutrons and electrons does Be2+ have?

4, 5, 2

4, 3, 4

4, 3, 6

4, 4, 2

Beryllium (Be) has an atomic number of 4, which means it has 4 protons. The atomic mass of beryllium is 9, so subtracting the atomic number from the atomic mass gives us the number of neutrons, which is 5. The charge of Be2+ indicates that it has lost two electrons, so the number of electrons is 2. Therefore, the correct answer is 4 protons, 3 neutrons, and 2 electrons.

Explanation

Beryllium (Be) has an atomic number of 4, which means it has 4 protons. The atomic mass of beryllium is 9, so subtracting the atomic number from the atomic mass gives us the number of neutrons, which is 5. The charge of Be2+ indicates that it has lost two electrons, so the number of electrons is 2. Therefore, the correct answer is 4 protons, 3 neutrons, and 2 electrons.