Light and Electrons

Light and Electrons

Assessment

Flashcard

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Practice Problem

Hard

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Wayground Content

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30 questions

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1.

FLASHCARD QUESTION

Front

What is the mass number of He?

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Back

4

2.

FLASHCARD QUESTION

Front

What is the atomic number of He?

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Back

2

3.

FLASHCARD QUESTION

Front

How many protons, neutrons, and electrons are in this helium isotope?

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Back

2 protons, 2 neutrons, 2 electrons

4.

FLASHCARD QUESTION

Front

Where does the average atomic mass come from for hydrogen?

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Back

weighted average of all isotopes of hydrogen

5.

FLASHCARD QUESTION

Front

Where do elements like Beryllium-8 come from? Use helium as an example.

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Back

Fusion between another helium gives us 4 protons and 4 neutrons (beryllium - 8).

6.

FLASHCARD QUESTION

Front

What does the number 91 represent in the name zirconium-91?

Back

the mass number

7.

FLASHCARD QUESTION

Front

Which of the following sets is correct? Zn-65, 65 protons, 65 electrons, Mg-24, 12 protons, 12 neutrons, U-238, 92 protons, 92 neutrons, Pb-207, 207 protons, 207 electrons

Back

Mg-24, 12 protons, 12 neutrons

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