Isotopes and Atomic Structure Quiz

What do isotopes of the same element have in common?

• Same number of neutrons

• Same number of electrons

• Same number of protons

• Different atomic numbers

How many protons are in Nitrogen-15?

• 5

• 7

• 8

• 15

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What is the mass number of an atom with 17 protons and 18 neutrons?

• 34

• 17

• 35

• 18

In the electron cloud model, what does the 'cloud' represent?

• Electrons in fixed orbits

• Location where electrons are likely to be found

• Protons and neutrons

• A nucleus field

The atomic mass of chlorine, with isotopes 35Cl and 37Cl, is approximately ___.

The electron configuration for potassium (K) is ___.

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NGSS.HS-PS1-1

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Valence electrons are located in the ___ energy level of an atom.

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Rank the following in order of increasing atomic radius: F, K, Br.

• K < Ca < Fr

• Fr < Ca < Co

• Ca < Co < Fr

• Co < Fr < Ca

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Define an ionic bond.

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Write the formula for aluminum sulfide.