Assessment (6) Review Flashcards
Which Family of elements has a full valence shell?
Nobel gasses
What happens to ionization energy across a period
It increases as you travel from left to right
What happens to electrons in the valence shell when an ionic bond forms?
The electrons are taken from one atom and taken by another.
Is potassium iodide a molecule?
Ionic compound (1:1 ratio)
Physical and Chemical Properties of Sodium Chloride
White crystalline solid
Definition of a diatomic molecule and 1 example
Two bonded atoms
Example: O^2
What does a triple bond look like?
Three lines, each line represents two electrons.
In a polar covalent bond, electrons are not shared equally causing the molecule to have:
slight + and - charges.
Why does water have a higher boiling point than Co^2?
(Due to polarity and non- polarity of the molecules)
What is the chemical name for LiF?
Lithium Fluoride
In naming ionic compounds, to what do Roman Numerals refer?
How many of each element are in the sequence
What would be the formula for Beryllium combining with Chlorine?
BeCl^2
Why is metallic bonding similar to ionic bonding?
Attraction between opposite charge
Metals can be drawn into wires because:
when the metal is struck with a hammer, anions do not change positions
When more carbon is added to steel, what happens?
Carbon produces an oxide that keeps the steel from rusting
Why do atoms gain or lose electrons?
They are undergoing a lifelong quest to become a noble gas: stable!
In Lewis Dot Diagram, what does the symbol for the element represent?
All of the internal electrons, the electrons that are not in the valence shell
Which element is most stable?
Neon
What do subscripts in a compound indicate?
How many of the atom is required to stabilize the other atom
What are the properties of ionic compounds?
Usually crystalline solids
Looking at a chemical formula, differentiate between ionic compounds and molecules.
Ionic compounds mostly require metal in the bonding, while the molecules often are made of gases or metalloids
Long dashes in a drawing of a compound ( molecule) indicate:
Covalent Bonds
Water is polar due to
its bent shape in space as well as the slight polarity of the hydrogen and oxygen atoms.
Water has a higher boiling point due to:
the attraction between the water molecules.
