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59 Cards in this Set

  • Front
  • Back
The behavior of cathode rays in a glass tube containing gas at low pressure led scientists to conclude that the rays were composed of
negative particles
The basic principles of atomic theory that are still recognized today were first conceived by
Atoms of the same element can differ in
mass number
Dalton's atomic theory helped to expalain the law of conservation of mass because it state that atoms
could not be created or destroyed
Millikens experiments determined
the approximate value of the electron's mass
In rutherford's experiment, a small percentageof the postively charged particles bombarding the metal's surface
were deflected back toward the source from the metal
Most of the volume of an atom is made up of the
electron cloud
if an istope of Chlorine has a mass number of 37, how many neutrons does the atom have?
Isotopes are atoms of the smae element that differ in
The number of protons in the nucleus of an element is called its ____ number
The strong attractive forces that hold the nuclear particles together are called
The smallest particles of an element that retains the chemical properties of that element are
When calculating the percent error in the laboratory, the value that you as the student will measure is known as the __ value
Which of the following is not one of the colors found in the visible light spectrum?
a- blue
All of the following sets of quantum numbers are allowed EXCEPT
a- n=6, l=1, m=-1
b- n=1, l=4 m=0
c. n=4, l=1, m=-1
d. n=3, l=2,m=+2
An oribital that would never exist in the quantum description of an atom is
a. 3d
b. 6D
c. 8s.
d. 3f
Which of the following requies that each of the p oribitals at a particular level have one electron before any of the them have two electrons?
Hund's rule
Whenever an excited hydrogen atom falls back from an excited state to it's ground state, the
energy decreases
Bohr's model showed the path that electrons circled around the nuclues for each element
What is the total number of electrons needed to fill the fourth main energy level?
When an electron is the oribtal closet to the nucleus, it is said to be in the _ state
The magnetic quantum number indicates the
orientation of the oribital around the nucleus
The element Sodium will have electrons in all of the following subshells EXCEPT
If you want to determine the shape of an elements oribital you would look at which quantum number
angular momentum
An electron occupies the lowest energy orbital that can receive it
Aufbau Principle
Oribitals of equal energy are occupied by one electron before any oribtial is occupied by a second electron
hund's rule
No two electrons in the same atom can have the same four quantum numbers
Pauli exclusion principle
The single electron of hydrogen oribits the nuclues only in allowed orbitals, each with a fixed energy
Bohr model of the atom
We know that the modern day periodic chart is arranged by increasing atomic number, but who was given credit for first arranging it in order by atomic mass?
The discovery of the noble gases changed Mendeleev's periodic table by adding a new
MOseley discovered that elements with similar properties occurred at regular intervals when the elements were arranged in order of increasing
atomic number
Within the P-block group, the elements at the top of the table___ than those at the bottom
Have larger electronegativity
Within a group of elements, as the atomic number increases, the atomic radius
Generally decreases
The most characteristic property of the noble gases is that they are
largely unreactive
the number of valence electrons for Group 2 elements are
The ion who has gained two electrons is
a. Mg +2
b. Br -
c. Na+
D. S 2-
The maximum number of valence electrons that an element can have is
An ion is an element with
A positive or negative charge
Which of the following is an example of an anion
a. Cl-
b. Mg 2+
c. K+
d. Cu
The energy required to remove an electron from an atom is called its
ionization energy
An ionic bond results from electrical attraction between large numbers of
cations and anions
Bond length is the distance between two bonded atoms at
their minimum potential energy
To draw a lewis structure, its is NOT necessary to know
bond energies
When a double bond is formed, how many pairs of electrons will the two atoms share?
The principle that states that atoms tend to form compounds in which each atoms has eight electrons in it's highest occupied energy level is called the
Octet rule
Lattice energy is an indication of the
Strength of the ionic bond
A ___ bond is formed when a pair of electrons are shared between two atoms
Which intermolecular force contributes to the high boiling point of water?
Hydrogen bonding
If a bond is classifed as polar-covalent, the range of electronegativity difference will be
0.3 to 1.7
Which of the following is an example of an ionic bond
a. KCl
b. IBr
c. H2O
When calculating the formula mass of a compound, which unites will be used?
In a polyatomic ion, the algebraic sum of the oxidation numbers of all atoms is qual to
The charge of the ion
Using the stock system of nomenclature for this ionic Compound, Cr2 (SO4)3 is named
Chromium ( III) sulfate
If sulfur formed an ion, which of the following choices would it look like?
a- S2+
b- S2-
c S6-
d- S16
in the compound Na202 oxygen has an oxidation number of -1. What are the oxidation numbers for this compound?
What is the formula for the covalent compound PBR3?
phosphorus tribromide
In the compound N30, which previx should be used when naming nitrogen
The term used to describe the naming systems for binary ions and covalent compounds is
When determing the formula in an ionic compound what happens to the charges?
They are crossed