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Questions and Answers
Questions and Answers
Who discovered X-rays in 1895?
Who discovered X-rays in 1895?
- Ernest Rutherford
- John Joseph Thomson
- Wilhelm Roentgen (correct)
- Dmitri Mendeleev
Which scientist proposed an atomic model with electrons moving in concentric orbits around the nucleus?
Which scientist proposed an atomic model with electrons moving in concentric orbits around the nucleus?
- Ernest Rutherford
- Henry Moseley
- James Chadwick
- Niels Bohr (correct)
What is the measure of an atom's tendency to attract electrons towards itself?
What is the measure of an atom's tendency to attract electrons towards itself?
- Atomic number
- Electronegativity (correct)
- Principal quantum number
- Atomic mass
Which scientist discovered protons in 1910-1911?
Which scientist discovered protons in 1910-1911?
What type of bond forms between atoms with an electronegativity difference of less than 0.5?
What type of bond forms between atoms with an electronegativity difference of less than 0.5?
Who discovered neutrons in 1932?
Who discovered neutrons in 1932?
How many valence electrons does Ge have based on its electron configuration?
How many valence electrons does Ge have based on its electron configuration?
According to Bohr's model, how do electrons move around the nucleus?
According to Bohr's model, how do electrons move around the nucleus?
What is the main characteristic of a covalent bond?
What is the main characteristic of a covalent bond?
How many valence electrons does Na have?
How many valence electrons does Na have?
In a polar covalent bond, what is the range of electronegativity difference between the bonded atoms?
In a polar covalent bond, what is the range of electronegativity difference between the bonded atoms?
What do Lewis dot symbols represent in electron configurations?
What do Lewis dot symbols represent in electron configurations?
In a molecule, which element typically becomes partially negative?
In a molecule, which element typically becomes partially negative?
What is the significance of the valence electron in an atom?
What is the significance of the valence electron in an atom?
Based on electronegativity values, which bond is most likely to be ionic?
Based on electronegativity values, which bond is most likely to be ionic?
In the Bohr model of the atom, where are the electrons located?
In the Bohr model of the atom, where are the electrons located?
Which quantum number defines the shape of an orbital?
Which quantum number defines the shape of an orbital?
What does the electron configuration 1s2 2s2 2p4 represent?
What does the electron configuration 1s2 2s2 2p4 represent?
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