Atomic Structure and Periodic Table

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

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NGSS.HS-PS2-4

subatomic particles found on the outermost shell & responsible for the atom's reactivity

• neutrons
• valence electrons
• isotopes
• ions

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

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NGSS.HS-PS1-8

Value representing the number of protons in an element

• Atomic Mass
• Mass Number
• Valence Electrons
• Atomic Number

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

• Electron Shells
• Orbitals
• Electron Cloud
• Nucleus

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NGSS.HS-PS1-8

A horizontal row of elements in the periodic table

• Molecule

• Period

• Family

• Atom

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NGSS.HS-PS1-1

How many neutrons does calcium have?

• 20

• 40

• 60

• 0

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NGSS.HS-PS1-8

What is the atomic mass of Arsenic?

• 33

• 107

• 75

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NGSS.MS-PS1-1

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

An element's identity is determined by the number of

• electrons.
• protons.
• neutrons.
• valence.