Atomic Size
Which atom is bigger: F or I?
I
Electronegativity is the measure of...
How strongly an atom is attracted to shared electrons in a bond.
Ionic bonds are formed between...
metals and nonmetals.
What does polar mean?
Something that is polar has two oppositely charged sides.
Which is bigger: Br or K?
K
How are electronegativity and polarity related?
Higher electronegativity indicates higher polarity in a bond.
Two of the same atom bonding together would create what type of bond?
Non-polar covalent
How do you calculate ED?
Subtract the two electronegativity values.
What is the largest atom on the periodic table?
Francium (Fr)
Which has higher electronegativity: silicon or oxygen?
Oxygen
A bond with an ED of 0.35 would create what type of bond?
Non-polar covalent
Which two periodic trends help determine if an atom is a good replacement for another?
Number of valence electrons and electronegativity.
What is the periodic trend for atomic size/radius?
Atoms get bigger as you go down and to the left.
Why do atoms have different electronegativities?
The size of an atom determines its electronegativity.
What is the electronegativity difference AND bond character of C-H?
0.35 and non-polar covalent
What is a dipole and what symbol do you draw when annotating a molecule with dipoles?
A dipole is the polarity of a polar bond or molecule. You draw a dipole arrow (picture on the board).
What are the two factors that determine atomic size/radius?
Number of electron shells and number of protons.
Which way will the shared electrons be pulled in MgI2 and why?
They will be pulled toward the iodines because they have higher electronegativity than the magnesium.
What happens to the shared electrons in each type of bond:
Non-polar covalent
Polar covalent
Ionic
Non-polar covalent: share electrons equally
Polar covalent: the electrons move towards the atom with higher electronegativity
Ionic: the atom with higher electronegativity takes the electron from the other
In the penguin and polar bear comic, what did the penguins, polar bears, and ice cream scoops represent?
Penguins: atoms with low electronegativity
Polar bears: atoms with high electronegativity
Ice cream scoops: shared electrons in a bond