Combustion, Heat, and Energy
1. What is potential energy?
2. What is kinetic energy?
1. Stored energy
2. Energy of an objects motion
What is the charge for protons, neutron,s and electrons?
Protons: Positive
Neutrons: Neutral
Electrons: Negative
Where are valence electrons located?
What is the octet rule?
An atom must have 8 electrons to be happy
What is the subscript for in a chemical formula?
The # of that element.
Ex: H20 (2 hydrogens, 1 oxygen
What is combustion?
A chemical change in which an element or compound reacts with oxygen to produce energy in the form of heat and light.
What is an isotope?
An atom that has the same number of protons but different numbers of neutrons.
What is the difference between metals and non-metals?
Metals have a good conductor of heat and electric current, while non-metals have a poor conductor of heat and electric current.
1. Cations are _____ (positive or negative), and are usually _____ (metals or non-metals)?
2. Anions are _____ (positive or negative), and are usually _____ (metals or non-metals)?
1. Cations are positive, and are usually metals.
2. Anions are negative, and are usually non-metals.
What are the 3 steps to writing Ionic Formulas?
1. Write the cation(metal) first. (Symbol and charge)
2. Write anion(non-metal) next. (Symbol and charge)
3. Criss cross charges if different. (Write as subscript) + don't write "1", "-", "+"
-Energy content of food-
The food we consume is broken down during exercise (_____), then releases ____ (sweat).
The food we consume is broken down during exercise (combustion), then releases heat (sweat).
Electrons: Atomic #
Protons: Atomic number
Neutrons: Mass#-Atomic#
What elements tend to have properties similar to metals and non-metals?
Meteloids
Define lone-pair electron:
Define bonding electrons:
Define lone-pair electron: When 2 electrons in a lewis dot structure are already paired.
Define bonding electrons: When there is only 1 electron on either sides of a lewis dot structure that is able to pair with another.
Name this covalent compound:
N2O
Dinitrogen Oxide
Starting mass/energy=
Starting mass/energy=ending energy
What is the noble gas configuration of potassium?
1s2, 2s2, 2p6, 3s2, 3
How does the ionization energy change as you move across a period in the periodic table?
The ionization energy increases
Define Solubility:
Define Conductivity:
Define Solubility: A substance that can dissolve.
Define Conductivity: The ability for water to pass through an electric current.
Name this ionic compound:
MgCl2
Magnesium Chloride
What takes longer to heat up than granite and needs more energy to heat up?
Water
To move from one energy to another, an electron must ___ or ___ just the right amount of energy.
To move from one energy to another, an electron must gain or lose just the right amount of energy.
Explain the concept of the Lewis Dot structure for elements?
To determine the number of valence electrons based on its group in the periodic table
What element doesn't meet the octet?
Hydrogen
Name this ionic compound:
Zn3(PO4)2
Zinc(2) Phosphate
Number should me Roman numeral, only write it if there first element is a transition metal.