Atomic Structure & Periodic Table

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

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

• neutrons
• valence electrons
• isotopes
• ions

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NGSS.HS-PS1-2

Value representing the number of protons in an element

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

Where electrons are likely to be found as they travel around the nucleus

• Nucleus
• Electron Cloud
• Within a Proton
• Within a Neutron

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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A horizontal row of elements in the periodic table

• Molecule

• Period

• Family

• Atom

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What is one way Neutrons are different from electrons?

• they both are negative

• neutrons have no charge, while electrons have a negative charge

• Both are in the nucleus( center of atom)

• Electrons are inside nucleus and neutrons are outside the nucleus.

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What is the atomic number?

• 35

• 18

• 17

• 52

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NGSS.HS-PS1-1

How many protons and electrons does this element have?

• 35

• 18

• 17

• 52

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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