History of Atoms
Bohr Models
Periodic Table
Bonding
Chemical Interactions
Metals vs. Nonmetals
Water and Aqueous Solutions
Math 1
Math 2
100
This ancient Greek philosopher first proposed the idea of the atom, naming it from the Greek word "atomos," meaning indivisible.
Democritus
100
In a Bohr model, the first energy level can hold this maximum number of electrons.
2
100
The atomic number of an element on the periodic table represents these subatomic particles in a stable atom.
Protons and or electrons
100
Draw the lewis dot structure for carbon
Mr. Pace will decide
100
A bond is considered nonpolar if the electronegativity difference between the two atoms is less than this value.
What is 0.4?
100
These elements, found on the left side of the periodic table, are typically good conductors of heat and electricity.
Metals
100
Water's polarity allows it to dissolve many ionic compounds, making it known as this type of solvent.
Universal Solvent
100
You have a solution that contains 2.5 moles of sodium chloride (NaCl) dissolved in 4.0 liters of water. What is the molarity of the solution?
0.625 M.
100
This type of reaction occurs when two or more substances combine to form a single product.
What is a synthesis (or combination) reaction?
200
This scientist's 1897 discovery of the electron led to his "plum pudding model" of the atom.
JJ Thomson
200
If an element’s Bohr model shows two energy levels with a total of 9 electrons, this element is represented on the periodic table.
Fluorine
200
Elements in the same groups of the periodic table share this property, which determines their chemical behavior.
# of valence electrons
200
Ionic bonds form between these two types of elements.
What are metals and nonmetals?
200
If the electronegativity difference between two atoms is greater than 2.0, the bond is generally classified as this type.
What is ionic?
200
This property of metals allows them to be hammered or rolled into thin sheets without breaking.
malleability
200
This property of water, due to hydrogen bonding, allows it to rise up a plant's stem against gravity.
What is capillary action?
200
You have a 3.0 M solution of hydrochloric acid (HCl), and you have 2.5 liters of this solution. How many moles of HCl are present in the solution?
7.5 moles
200
What is the percent composition of calcium (Ca), carbon (C), and oxygen (O) in calcium carbonate (CaCO₃)?
- Percent composition of calcium in CaCO₃ = 40.0%
- Percent composition of carbon in CaCO₃ = 12.0%
- Percent composition of oxygen in CaCO₃ = 47.9%
300
This scientist's quantum model introduced the idea that electrons orbit the nucleus in specific energy levels.
Bohr
300
The electrons found in the outermost energy level of a Bohr model are referred to by this term.
Valence Electrons
300
The rows of the periodic table are called periods and indicate this characteristic of an element's electron configuration.
What is the number of energy levels?
300
Covalent bonds involve the sharing of these subatomic particles.
Valence Electrons
300
This type of intermolecular force, the weakest of them all, arises due to temporary dipoles in molecules.
What are London dispersion forces?
300
These elements, often found to the right of the periodic table, are generally poor conductors of electricity and heat.
Nonmetals
300
In a solution, the substance that dissolves and is present in the lesser amount is called this.
Solute
300
How many moles are in 50.0 grams of sodium chloride (NaCl)?
0.855 moles
300
A compound contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is the Empirical AND Molecular formula of the compound?
Molar Mass: 60
CH₂O
C₂H₄O₂.
400
A common isotope of uranium has a mass number of 238 and an atomic number of 92. The number of neutrons in this isotope is equal to this value.
146
400
In a Bohr model of sodium, the third energy level contains just one electron. This determines sodium’s chemical reactivity with elements from this group.
What is the halogens (Group 17)?
400
What group(s) are considered the noble gases?
Group 18
400
In a covalent bond, if the electrons are shared unequally, the bond is described by this term.
Polar
400
Hydrogen bonding occurs when hydrogen is covalently bonded to one of these three highly electronegative elements.
What are nitrogen, oxygen, or fluorine?
400
Metals tend to form this type of bond with other metals, where electrons are shared freely in a "sea" of electrons.
Metallic Bond
400
The substance that dissolves the solute and is present in the greater amount in a solution is called this.
Solvent
400
How many grams of sodium chloride (NaCl) are present in 4.0 moles of NaCl?
234 grams
400
Balance the following chemical equation:
H2 + O2 = H2O
1,1,2
500
Why isn't electrons included in the atomic weight?
They don't weight enough. 1/1000 of a proton in terms of weight
500
Which element is this?
Magnesium
500
How do the electronegativities change on the periodic table?
As you go down in each group, the electronegativity gets smaller
500
What are metallic bonds neither ionic or covalent?
It depends on the metals and their properties, they can both share or give and take
500
what is the difference between intermolecular forces and intramolecular forces
Intermolecular: forces of attraction between molecules
Intramolecular: Forces within a molecule
500
This property of metals refers to their ability to be drawn into thin wires.
Ductility
500
This term describes the maximum amount of solute that can dissolve in a given amount of solvent at a specific temperature.
Solubility
500
How many moles of water (H₂O) are there in 3.0 × 10²³ molecules of water?
.5
500
Balance the following chemical equation and tell me what type of reaction:
C4H10 + O2 = CO2 + H2O
2,13,8,10