Electronegativity
True or false? Electronegativity is a number that describes the relative ability of an atom to attract electrons. The when it trends down on the period table, it increases.
False
As you go down a group why does the atomic size increase?
More orbitals; less attraction between the valence electrons and protons in nucleus.
Which element has higher ionization energy? Carbon or aluminum
Carbon
The ion form of Hydrogen
H+
I determine what type of atom I am.
Protons / Atomic Number
A 3 dimensional region around a nucleus in which it is likely to find an electron.
Orbital
Do electrons ever change their energy level? Give an example or counter example.
Yes
Which has a larger radius, Sulfur or Phosphorus?
Phosphorus
Which element has higher ionization energy? Sulfer or Chlorine
Chlorine
How many valence electrons do elements in group 15 have and what kind of ion will they typically form?
5, anions
The ion form of Cl
Cl-1
Each electron enters the lowest energy orbital available first
Aufbau Principle
Using their location on the periodic table, determine the rank from least to greatest with the elements: Cl, Mg,Ca,N, and O
Ca,Mg,N,Cl and O
Which element has a smaller radius, sodium or magnesium?
Magnesium
Does the trend for ionization energy across the periodic table increase or decrease? and why?
Increase - smaller radius, electron is closer to the nucleus which makes it more difficult to pull
Why does it take more energy to remove the second electron from Aluminum than it did the first?
Removing a paired electron from the s orbital vs an unpaired electron from the p orbital.
Which trends in the periodic table increase across and decrease downwards?
electron affinity, electronegativity, ionization energy
I am an alkali earth metal with 3 energy levels.
Magnesium / Mg
How many sub-orbitals does a d-orbital have?
5
Predict which of the following elements has the largest Electronegativity and state why? Na and Rb
Sodium is higher because sodium is higher then Rb in the periodic table.
DAILY DOUBLE
As you move across the periodic table does the size of an atomic radius increase or decrease and why?
Decreases - has the same # of orbitals, more protons and elections therefore greater attraction and pull towards the nucleus
Define Ionization energy?
the energy required to remove a valence electron from an atom in its gaseous state.
Which element is the most electropositive?
Francium
Which trends in the periodic table increase downwards and decrease across?
Atomic radius, reactivity
I have the most electrons of any element.
Oganesson
What is the electron configuration of copper?
1s2 2s2 2p6 3s2 3p6 4s1 3d10
How does the trend go for Electronegativity and explain why
Trend down - the larger atom will pull less strongly on the electron pair since they are further to its nucleus Trend across - the smallest atom will pull more strongly on the election pair since they are closer to its nucleus
Using their location on the periodic table, rank the size of following sets of elements in order of increasing atomic size. Mg, S, Cl,Li, Cs and K
Cl, S, Mg, K, Cs
In an ionization energy, when the trend goes down, what happens? and why?
the trend decrease - more orbitals, electron further from nucleus and it is easier to remove an electron
In general, as you go across a period in the periodic table from left to right: the atomic radius ________; the electronegativity _________; and the first ionization energy ________.
decreases, increases, increases
Who invented the periodic table
Dmitri Mendeleev
I am not a metal nor non-metal and have 5 valence electrons
Antimony / Sb
Arsenic / As
DAILY DOUBLE
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p5
What element is this?
Iodine
The shorthand notation for Uranium
[Rn]7s25f4