Atomic Structure, Models, and Theory
Periodic Table and Trends
Chemical Bonding, Structures, and Names
Stoichiometry
Chemical Reactions
100
Bohr
Who is credited with the idea of electrons in orbitals?
100
transition metal
What is a type of element which is characterized by the presence of electrons filling the orbital?
100
negative ions
In a crystal of an ionic compound, each cation is surrounded by a number of ______.
100
one is g and one is g/mol
What is the difference between the units of molecular or formula mass and the units of molar mass?
100
boiling water
What is an example of physical change?
200
Boron
What is the atom with 5 protons, 6 electrons, and 5 neutrons?
200
remove
Ionization energy is energy required to ____ an electron from an atom.
200
shared by all surrounding atoms
In metals, the valence electrons are considered to be ________.
200
Law of Conservation of Mass/Matter
Equations must be balanced so that they will obey this law.
200
carbon hexafluoride
What is CF6?
300
Schrodinger
Who first used the term "electron cloud"?
300
horizontal
Which way do the periods go?
300
luster, thermal conductivity, and electrical conductivity
Mobile electrons in the metallic bond are responsible for what?
300
The reagents which do not run out when the reaction stops.
What are the reactants/reagents in excess?
300
a gas forms, a precipitate forms, energy is released in the form of light or heat, color change
What are signs that a chemical reaction has taken place?
400
gold foil
What did Rutherford use in his experiments?
400
vertical
Which way do the groups go?
400
increases
The strength of the metallic bond _____ moving from left to right on any row of the periodic table.
400
1 mole over x grams or x grams over 1 mole
What is the unit factor for a problem involving molar mass?
400
2
How many non-metals is a covalent compound made of?
500
he first identified and named neutrons
What did Chadwick contribute to the atomic structure?
500
an anion
What is the type of ion formed by 7A electrons which will be negative due to the gain of electrons?
500
chemical bonds
The fact that metals are malleable and ionic crystals are brittle is best explained in terms of their _____.
500
the numbers for a mole/mole ratio
To get these, look at the coefficients in the balanced equation.
500
mass cannot be created or destroyed in ordinary chemical and physical changes
The Law of Conservation of Mass states what?
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