Question

8.4) what is a spectrometer?
a. a tool used by chemists to measure the weight of different substances
b. a tool used by chemists to see tiny particles in substances
c. a tool used by chemists to study the makeup of substance by looking at the way they take in or give off light
8.5) what tool allows chemists to see tiny particles in substances that are too small to see with the naked eye?
a. balance
b. microscope
c. spectrometer
d. thermometer
8.6) what chemist played an important role in figuring out the structure of dna?
a. linus pauling
b. rosalind franklin
c. marie curie
d. robert boyle
answer the questions.
8.7) what is alchemy?
8.8) what are some examples of famous chemists and their contributions to science and society?

Explanation:

• 8.4: A spectrometer is a tool used by chemists to study the makeup of a substance by looking at the way they take in or give off light.
• 8.5: A microscope allows chemists to see tiny particles in substances that are too small to see with the naked eye.
• 8.6: Rosalind Franklin played an important role in figuring out the structure of DNA.
• 8.7: Alchemy was an ancient practice that combined chemistry, philosophy, and spirituality. It aimed to transform base metals into noble metals (like gold), find the elixir of life, and achieve spiritual enlightenment.
• 8.8:
• Marie Curie: Discovered radioactivity and two new elements (polonium and radium). Her work laid the foundation for modern radiation physics and medical uses of radiation (e.g., cancer treatment).
• Robert Boyle: Known as the “father of modern chemistry.” He defined elements, compounds, and mixtures, and formulated Boyle’s Law (relationship between pressure and volume of a gas).

Answer:

• 8.4: C. a tool used by chemists to study the makeup of substance by looking at the way they take in or give off light
• 8.5: B. microscope
• 8.6: B. Rosalind Franklin
• 8.7: Alchemy was an ancient practice combining chemistry, philosophy, and spirituality, aiming to transform base metals, find the elixir of life, and achieve spiritual enlightenment.
• 8.8:
• Marie Curie: Discovered radioactivity and elements (polonium, radium); foundation for radiation physics and medical radiation use.
• Robert Boyle: Defined elements/compounds/mixtures; formulated Boyle’s Law.