7. Elements and Trends Flashcards
What is an angular node?
Anodeis a point where the electron probability is zero. Angular nodesare typically flat plane (at fixed angles), like those in the diagram above. The ℓ quantum number determines the number ofangular nodesin an orbital
What is the atomic size trend?
atomic radius increases down a group and decreases left to right across a period
What is coordination chemistry?
the study of transition metal complexes
What does degenerate mean?
describes orbitals with the same energy
What is the electron affinity trend?
Electron affinity becomes less negative down a group. As the principal quantum number increases, the size of the orbital increases and the affinity for the electron is less.
What is the electronegativity trend?
as you move down a group on theperiodic table, the electronegativity of an element decreases because the increased number of energy levels puts the outer electrons very far away from the pull of the nucleus. Electronegativityincreasesas you move from left torightacross a period on theperiodic table
What is the ionisation energy trend?
the generaltrendis forionisation energiesto increase across a period
What is a radial node?
Anodeis a point where the electron probability is zero. Radial nodesare spheres (at fixed radius) that occurs as the principle quantum number increases
What is an oxidation state?
the charge that an atom in a molecule or ion would have if all of the electrons in its bonds belonged entirely to the more electronegative atoms
How many nodal planes do (four of the) d-orbitals have?
Two
What is the electron configuration of Chromium?
[Ar] 4s^1 3d^5
What is the electron configuration of copper?
[Ar] 4s^1 3d^10
True or False: In forming ions, s electrons are lost before d electrons
True
What is the electron configuration of Cu(II)?
[Ar] 3d^9
