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Theo Chem semester final
Terms in this set (28)
Properties of matter that depend on sample size are said to be (intensive or extensive)
Are physical and chemical properties intensive or extensive?
What is a solute?
dissolves in solvent to form solution
What is a solution?
Formed after solute is put in solvent
What is a solvent?
thing you start out with
Who demonstrated that most of an atom is empty space surrounding a dense nucleus?
Who developed the plum pudding model?
Who discovered the neutron?
Who said it is not possible to determine both momentum and position of an electron at the same time?
Who discovered the electron?
Who proposed that electrons move in energy levels around the nucleus of an atom?
Who determined that two electrons cannot be at the same energy level, in the same sublevel, occupying the same orbital with the same spin?
Distinguish an ion from an atom on the subatomic level.
Ion is charged, atom is neutral
Distinguish between an isotope and an ion.
Isotope has same P+, different neutrons
Why is the average atomic mass of an element not a whole number?
Because it is the average of all isotopes
When an atom emits a photon, one of its electrons goes to a __ (higher energy, lower energy) orbital?
This means the electron is now ___ (closer to, farther from) the nucleus?
How many valence electrons do the the noble gases have?
8, except He with 2
What does periodicity mean?
periodic repetition of properties
What charge do ions of the alkali metals have?
lose 1 valence electron
To whom do we attribute the modern periodic table?
Which way does atomic radius go?
left and down
Which way does ionization go?
Up and to the right
Which way does affinity go?
Up and to the right
What does atomic radius mean?
What does ionization energy mean?
Energy needed to steal an electron
Who does affinity mean?
when an atom gains an electron it becomes a(n) ___ (anion or cation) and becomes ___ (larger or smaller)
anion and larger
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