Chemical Energy

What is chemical energy?

• Energy stored within bonds of atoms and between molecules

• Energy from moving electrons

• Energy associated with the movement of light, electromagnetic waves or particles

• Energy possessed by an object due to movement or position.

• Energy released when the nuclei of atoms are split or fused

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NGSS.HS-PS1-4

Examples of chemical energy that people often use include: coal, oil & gas or sugar.

How do we use these sources of chemical energy?

• We burn them by breaking bonds to release energy

• We excite them an cause a current

• We release it by splitting or fusing the nuclei of atoms

• Increase the temperature and cause the molecules to vibrate

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NGSS.HS-PS1-4

What is the symbol for (C) Carbon

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NGSS.HS-PS1-1

What are the 3 basic types of chemical bonds?

• Metallic

• Covalent

• Ionic

• Platonic

In the real world are things made of only one type of bond?

• Yes

• No

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NGSS.HS-PS1-4

Match the bond to its example.

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NGSS.HS-PS1-1

What is the atomic number of (H) hydrogen?

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NGSS.HS-PS1-1

What is the relative atomic mass of He (Helium)?

write exactly as seen on the chart

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NGSS.HS-PS1-1

Relative atomic mass is determined by _________.

• # of protons

• # of neutrons

• # of electrons

• # of atoms

Atomic number is determined by _________.

• # of protons

• # of neutrons

• # of electrons

• # of atoms