Podcast
Questions and Answers
Who is credited with discovering the law of conservation of mass?
Who is credited with discovering the law of conservation of mass?
- Antoine Lavoisier (correct)
- Democritus
- Joseph Proust
- John Dalton
What does the Greek term 'atom' mean?
What does the Greek term 'atom' mean?
- Fire element
- Not cut (correct)
- Solid particle
- Subdivided matter
According to John Dalton's atomic theory, what is true about all matter?
According to John Dalton's atomic theory, what is true about all matter?
- All matter consists of air, earth, fire, water elements.
- Atoms retain their identity in all chemical reactions. (correct)
- Different elements have identical atoms.
- Atoms are destructible and lose their identity in chemical reactions.
What did Democritus propose about matter that differed from Greek philosophers?
What did Democritus propose about matter that differed from Greek philosophers?
Which scientist proposed that compounds consist of elements combined in small whole-number ratios?
Which scientist proposed that compounds consist of elements combined in small whole-number ratios?
According to the law of constant composition, what does a given chemical compound always contain?
According to the law of constant composition, what does a given chemical compound always contain?
What is the charge of an electron?
What is the charge of an electron?
What is atomic mass on the periodic table a weighted average of?
What is atomic mass on the periodic table a weighted average of?
Which subatomic particle is located in the nucleus and has a charge of +1?
Which subatomic particle is located in the nucleus and has a charge of +1?
In the context of silicon, which isotope has the highest natural abundance?
In the context of silicon, which isotope has the highest natural abundance?
For gallium, what is the average atomic mass?
For gallium, what is the average atomic mass?
What makes up most of an atom's mass?
What makes up most of an atom's mass?
Which isotopes of gallium are naturally occurring?
Which isotopes of gallium are naturally occurring?
What defines an element?
What defines an element?
Which term describes the number of protons and neutrons in an atom?
Which term describes the number of protons and neutrons in an atom?
How is the natural abundance of an isotope calculated?
How is the natural abundance of an isotope calculated?
What term is used to refer to atoms of the same element with different mass numbers?
What term is used to refer to atoms of the same element with different mass numbers?
How can isotope ratios be utilized according to the text?
How can isotope ratios be utilized according to the text?
What is a significant forensic application mentioned in the text?
What is a significant forensic application mentioned in the text?
How can the year of birth be determined using isotopes from tooth enamel?
How can the year of birth be determined using isotopes from tooth enamel?
What technique is mentioned for measuring isotopes in a sample?
What technique is mentioned for measuring isotopes in a sample?
Why do chemists treat most elements as consisting of 'averaged' atoms?
Why do chemists treat most elements as consisting of 'averaged' atoms?
What phenomenon led to a method for dating samples based on isotopes, as mentioned in the text?
What phenomenon led to a method for dating samples based on isotopes, as mentioned in the text?
Flashcards are hidden until you start studying
