Electrons and Periodic Trends
Which element in the fifth energy level have no unpaired electrons?
Xe
What is quantum?
amount of energy that is needed to move from one enegry level to the next
What was Schrodinger's scientific contribution?
came up with mathmatical formula ,shows where to find an electron
What is ionization energy and what is its trend?
energy required to overcome the attraction of the nucleus to remove a valence electron, down a column it decreases, across it increases
What is orbital?
regions where electrons are found (s, p, d, f)
How many orbitals does s, p, d, f have?
s-1 p-3 d-5 f-7
What is a quantum number?
same as energy level
What is atomic size and what is its trend?
size of an atom as reassured by atomic radius, down a column it increases, across it decreases
What is electronegativity and what is its trend?
tendency of an atom to attract electrons, down a column decreases, across it increases
How many valence electrons does Ra have?
2
What energy level is O?
2
Arrange the following in order of increasing energy: 5d, 3d, 2s, 4s, 4f, 3p
2s, 3p, 4s,3d, 4f, 5d
How many valence electrons does Ga have?
3
In element 48, how many energy levels are filled?
4
What energy level is Zn?
4
What energy level is Hg?
6
How many sublevels does Se have completely filled with electrons?
7
How many valence electrons does I have?
7
How many valence electrons does Xe have?
8
What is the definition of energy level?
Area around the nucleous where electrons are
What is an electron configuration?
Arrangment of electrons around the nucleous
What is a photon?
Beam of light
What element has no unpaired electrons in 4d?
Cd
What is the shape of s?
Circle
What was Bohr's scientific contribution?
Discoverd that electrons are in orbits
What is the shape of p?
Dumbell
What is Hund's Rule?
Each orbital gets one electron befor it pairs up
What is Aufbau principle?
Electrons enter the orbital at lowest energy level first
What scientist discovered electrons?
JJ Thompson.... Plum putting model
What is the Ground state?
Lowest enegry level that electrons exist
What is Photoelectric Effect?
Metals emit light when energy is emitted to them
What is Pauli's Exclusion Principle?
Orbitals can hold at most two electrons
What is the sublevel?
Regoin where electrons are found, more specific then orbitals
What is the shape of f?
To complex
What is the shape of d?
Two perpendicular dumbells