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Questions and Answers
What concept led to the synthesis of new elements in the laboratory?
What concept led to the synthesis of new elements in the laboratory?
- Isotopes
- Atomic mass
- Valence electrons
- Atomic number (correct)
Who discovered electrons, also known as 'corpuscles'?
Who discovered electrons, also known as 'corpuscles'?
- J.J. Thomson (correct)
- Johann Döbereiner
- Ernest Rutherford
- James Chadwick
What did Johann Döbereiner group elements into?
What did Johann Döbereiner group elements into?
- Periods
- Groups
- Triads (correct)
- Isotopes
Which experiment involved the use of gold foil to discover the atomic nucleus?
Which experiment involved the use of gold foil to discover the atomic nucleus?
What key factor made Johann Döbereiner's method of classifying elements obsolete?
What key factor made Johann Döbereiner's method of classifying elements obsolete?
Which region of the periodic table consists of elements that display properties of both metals and nonmetals?
Which region of the periodic table consists of elements that display properties of both metals and nonmetals?
Why did newly discovered elements not fit into Dobereiner's triads?
Why did newly discovered elements not fit into Dobereiner's triads?
Which scientist discovered the neutron?
Which scientist discovered the neutron?
Who proposed the idea of a tiny, extremely dense, positively charged region called the nucleus at the center of the atom?
Who proposed the idea of a tiny, extremely dense, positively charged region called the nucleus at the center of the atom?
Which scientist suggested that electrons travel around the nucleus in definite paths?
Which scientist suggested that electrons travel around the nucleus in definite paths?
Who refined Niels Bohr's experiment results after further investigating Rutherford's gold foil experiment?
Who refined Niels Bohr's experiment results after further investigating Rutherford's gold foil experiment?
Which model proposed by scientists demonstrated that electrons can be mostly found in specific regions around the nucleus?
Which model proposed by scientists demonstrated that electrons can be mostly found in specific regions around the nucleus?
Who developed the idea that electrons follow a strict circular path around the nucleus?
Who developed the idea that electrons follow a strict circular path around the nucleus?
In which year did Ernest Rutherford propose his nuclear model of the atom?
In which year did Ernest Rutherford propose his nuclear model of the atom?
Who discovered the neutron after further investigating Rutherford's gold foil experiment?
Who discovered the neutron after further investigating Rutherford's gold foil experiment?
Which scientist developed the concept that electrons can jump from one path on a level to another path on a different level?
Which scientist developed the concept that electrons can jump from one path on a level to another path on a different level?
Who developed the Electron Cloud Model in 1926 to mathematically determine regions where electrons can be mostly found?
Who developed the Electron Cloud Model in 1926 to mathematically determine regions where electrons can be mostly found?
Which scientist proposed an orbit model indicating the probability of finding an electron within a certain 'cloud' region?
Which scientist proposed an orbit model indicating the probability of finding an electron within a certain 'cloud' region?
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