18 Questions
Who discovered X-rays in 1895?
Wilhelm Roentgen
Which scientist proposed an atomic model with electrons moving in concentric orbits around the nucleus?
Niels Bohr
What is the measure of an atom's tendency to attract electrons towards itself?
Electronegativity
Which scientist discovered protons in 1910-1911?
Ernest Rutherford
What type of bond forms between atoms with an electronegativity difference of less than 0.5?
Covalent bond
Who discovered neutrons in 1932?
James Chadwick
How many valence electrons does Ge have based on its electron configuration?
4
According to Bohr's model, how do electrons move around the nucleus?
In concentric orbits
What is the main characteristic of a covalent bond?
Sharing of electrons
How many valence electrons does Na have?
1
In a polar covalent bond, what is the range of electronegativity difference between the bonded atoms?
0.5 to 1.9
What do Lewis dot symbols represent in electron configurations?
Valence electrons for an element
In a molecule, which element typically becomes partially negative?
The element with higher electronegativity
What is the significance of the valence electron in an atom?
Determines the chemical properties of an element
Based on electronegativity values, which bond is most likely to be ionic?
Potassium-Chlorine (K-Cl)
In the Bohr model of the atom, where are the electrons located?
In fixed orbits around the nucleus
Which quantum number defines the shape of an orbital?
Orbital quantum number (l)
What does the electron configuration 1s2 2s2 2p4 represent?
$O$ atom
Test your knowledge on the history of electron discovery and the arrangement of elements in the periodic table. Learn about the contributions of scientists like Dmitri Mendeleev, Wilhelm Roentgen, and John Joseph Thomson to the understanding of electrons and atomic structure.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
