Chemistry Review Element Identity and Reactivity

Which element is more reactive?

• Magnesium (Mg)

• Boron (B)

• Neon (Ne)

• Potassium (K)

Is this at stable or reactive?

• Stable

• Reactive

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NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What decides an elements reactivity?

• It's proton count

• It's electron count

• An elements valence electrons

• The elements mass

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What determines an element's energy levels?

• The electron shells

• The reactivity

• It's stability

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element is least reactive?

• Fluorine (F)

• Xenon (Xe)

• Hydrogen (H)

• Indium (In)

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NGSS.HS-PS1-2

Which is more reactive Helium (He) 2 or Florine (F) 9?

• Helium

• Florine

• they are roughly the same

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which particle has a positive charge?

• electron
• orbital
• proton
• neutron

Choose the particle that has no charge.

• nucleus
• neutron
• proton
• electron

Al elements has 3 protons and 4 neutrons. How many electrons are needed for this element to be neutral?

• 3

• 4

• 7

• 0

Tags

NGSS.MS-PS1-1

An element has 9 protons, 6 electrons and 10 neutrons. What is the charge of the nucleus?

• 19

• -9

• +9

• +15