Concept 1 Notes: Introduction to Electrons

Electrons (e-) are subatomic particles. How do they behave?

• They have a positive charge and are found in the nucleus.

• They have a negative charge and orbit the nucleus.

• They have no charge and are found in the nucleus.

• They have a positive charge and orbit the nucleus.

The electromagnetic spectrum is:

• A range of all types of electromagnetic radiation

• A type of sound wave

• A visible light spectrum

• A spectrum of mechanical waves

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True or False: As frequency (ν) increases, energy decreases.

• True

• False

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Fill in the blank: The electrons in the outermost energy level of an atom are ________ shell.

• valence

• core

• inner

• nuclear

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Determine the number of valence e⁻ from the __________ _______.

• group number

• atomic mass

• atomic number

• number of neutrons

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In the center of the electromagnetic spectrum, is a category of radiation classified as “visible light” because it is the only type of electromagnetic radiation we can see with the human eye. Which of the following is the correct order of colors in the visible light spectrum?

• Red, Orange, Yellow, Green, Blue, Indigo, Violet

• Violet, Indigo, Blue, Green, Yellow, Orange, Red

• Green, Yellow, Red, Orange, Blue, Indigo, Violet

• Blue, Green, Yellow, Orange, Red, Indigo, Violet

Which has a higher frequency – orange light or violet light?

• orange light

• violet light

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Which has a longer wavelength – radio waves or microwaves?

• Radio waves

• Microwaves

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Which has a longer wavelength – blue light or yellow light?

• Blue light

• Yellow light

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All electromagnetic waves have the same_______ in a vacuum.

• wavelength

• frequency

• energy

• speed

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