Chemistry, 15.10.2019 04:30 niyah0623

List the number of protons, neutrons, and electrons in each pair of isotopes.
a. 6/3li, 7/3li
b. 42/20ca, 44/20 ca
c. 78/34se, 80/34se

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The number of protons, neutrons, and electrons in each pair of isotopes is as follows on the basis of their atomic mass and the atomic number:

=> For option A.) - 6/3Li, 7/3Li

Lithium-6:

The atomic mass is 6 and the atomic number is 3 which means the number of protons is 3 and the number of neutrons is 3 and as it has no charge then, the number of electrons is equal to the number of protons that is 33 protons, 3 electrons, and 3 neutrons.

Lithium 7:

The atomic mass is 7 and the atomic number is 3 which means the number of protons is 3 and the number of neutrons is 4 and as it has no charge then, the number of electrons is equal to the number of protons that is 3.3 protons, 3 electrons, and 4 neutrons.

On the same logic, we can get the number of protons, neutrons, and electrons in each pair of isotopes

=> For option B.) 42/20Ca, 44/20 Ca

Calcium-42:

20 protons, 20 electrons, and 22 neutrons.

Calcium-44:

20 protons, 20 electrons, and 24 neutrons.

=> For option C.) 78/34Se, 80/34Se

Selenium-78:

34 electrons, 34 electrons, and 44 neutrons.

Selenium-80:

34 protons, 34 electrons, and 46 neutrons.

Learn more about sub-atomic particles:

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Answer from: AutumnJoy12

The answer to your question is:

Explanation:

a. 6/3Li, 7/3Li

Protons Neutrons Electrons

⁶₃ Li 3 3 3

⁷₃ Li 3 4 3

b. 42/20Ca, 44/20 Ca

⁴² ₂₀ Ca 20 22 20

⁴⁴ ₂₀ Ca 20 24 20

c. 78/34Se, 80/34Se

⁷⁸₃₄Se 34 44 34

⁸⁰₃₄Se 34 46 34

Answer from: Quest

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy

Answer from: Quest

i think it's letter a.

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List the number of protons, neutrons, and electrons in each pair of isotopes.
a. 6/3li, 7/3li<...

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