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Questions and Answers
Who proposed the concept of atoms in the fifth century BC?
Who proposed the concept of atoms in the fifth century BC?
- John Dalton
- Selyutin Artem
- Aristotle
- Leucippus and Democritus (correct)
Which English schoolteacher proposed his atomic theory in 1807?
Which English schoolteacher proposed his atomic theory in 1807?
- Aristotle
- Democritus
- John Dalton (correct)
- Leucippus
What distinguishes the chemical elements from each other?
What distinguishes the chemical elements from each other?
- Number of protons (correct)
- Kinetic-Molecular Theory
- Number of neutrons
- Atomic mass
What are forms of an element that have different numbers of neutrons called?
What are forms of an element that have different numbers of neutrons called?
What is the basic particle of the chemical elements?
What is the basic particle of the chemical elements?
Which of the following statements best describes an ion?
Which of the following statements best describes an ion?
According to Dalton’s atomic theory, what does an element consist of?
According to Dalton’s atomic theory, what does an element consist of?
What is the empirical formula of acetic acid?
What is the empirical formula of acetic acid?
What type of model can be used to represent a methane molecule with carbon and hydrogen atoms as spheres?
What type of model can be used to represent a methane molecule with carbon and hydrogen atoms as spheres?
How many copper atoms are approximately present in a pre-1982 copper penny?
How many copper atoms are approximately present in a pre-1982 copper penny?
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