Atomic Structure and Isotopes

The number of ______determines the identity of the atom.

• mass units

• protons

• electrons

• neutrons

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NGSS.MS-PS1-1

Neutral atoms have the same number of

• neutrons and protons.

• electrons and neutrons.

• protons and electrons.

• ions and protons.

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NGSS.MS-PS1-1

How many electrons does a neutral fluorine atom have?

• 5

• 7

• 9

• 11

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The best description for an isotope is

• The same type of atom with different numbers of neutrons.

• Atoms with the same number of electrons.

• Atoms of different elements with the same number of neutrons.

• Atoms that have a positive or negative charge.

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NGSS.HS-PS1-8

Carbon-13 is an isotope. What does the number 13 represent?

• the number of protons

• the number of isotopes carbon has

• the number of electrons

• the atomic mass

The picture is of the nuclear notation for Boron-11. What does the 5 represent?

• Boron's atomic mass

• The number of neutrons in a boron atom

• There are five isotopes of boron

• Boron's atomic number

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NGSS.MS-PS1-1

Which atom is represented by this Bohr model?

• Neon

• Chlorine

• Aluminum

• Fluorine

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NGSS.MS-PS1-1

The picture shows the notation for an isotope of beryllium. Which statement below is true according to this isotope notation?

• This isotope has 5 electrons.

• This isotope has an atomic number of 9.

• This isotope has 9 protons and 4 neutrons.

• This isotope has 4 protons and 5 neutrons.

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NGSS.MS-PS1-1

Which titanium isotope notation is correct for an isotope with 22 protons and 24 neutrons?

• 
• 
• 
• 

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NGSS.MS-PS1-1

Which isotope of iron is the most abundant or most common?

• iron-54

• iron-56

• iron-57

• iron-58

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NGSS.MS-PS1-1