Atomic Structure Basics

What subatomic particles would you find in the nucleus of an atom?

• Protons only
• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons 

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Which subatomic particles contribute the most to the mass of an atom?

• Protons, Neutrons, Electrons
• Protons only
• Protons and Electrons
• Protons and Neutrons

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

• 20
• 10
• 5
• 25

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What is the atomic number of the atom pictured? 

• 9
• 10
• 18
• 19

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What is the element name of the atom pictured? 

• Fluorine
• Neon
• Argon
• Potassium

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What is an atom mostly made up of?

• protons
• electrons
• empty space
• neutrons

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This particle determines what element you have - the elements identity.

• electron
• proton
• neutron
• valence shell

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What are valence electrons?

• electrons on the first orbital always
• nucleus
• the outermost shell
• the number of electrons on the outermost orbital

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NGSS.HS-PS1-2

What charge does the nucleus have and why?

• positive - the neutrons do not have a charge
• positive - the neutrons and protons are positively charged particles
• neutral - the neutral charge dominates the positive charge
• neutral - electrons cancel out the positive charge of the atom

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NGSS.MS-PS1-1

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

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