5.1 q

What is the smallest piece of aluminum according to modern scientific understanding?

What does the repeated dividing of aluminum foil demonstrate?

What major question did scientists struggle with over time regarding the structure of matter?

How long has the modern view of the atom been developed through scientific thinking and experimentation?

What has the understanding of the properties of the atom led to?

What happens when you pass high-voltage electricity through a gas?

• The gas cools down.

• The gas lights up.

• The gas changes color.

• The gas evaporates.

What is the purpose of a diffraction grating in observing light from a gas discharge tube?

• To increase the brightness of the light.

• To separate the light into its component colors.

• To focus the light into a single beam.

• To change the color of the light.

What do the unique patterns of spectral lines of elements represent?

• The temperature of the element.

• The density of the element.

• The "fingerprints" of the elements.

• The weight of the element.

Which element has more spectral lines, nitrogen or helium?

• Helium

• Nitrogen

• Both have the same number of spectral lines.

• It depends on the temperature.

How many electrons does helium have?

• Two

• Four

• Six

• Seven