Chem ch 4
Anion
A negatively charged ion is called an ________
False
An atom that gains three electrons will have a +3 charge
True
An electron can behave as either a wave or a partjcle
Quantized
Because energy levels are ______ energy emissions come in certain quantities
J.J. Thomson
Cathode rays
True
Dalton based his atomic model on both experimental evidence and logic
Hunds rule
Described how electrons fill a sublevel
Aufbau principle
Describes how electrons fill orbitals
True
Each atom can be identified by the number of protons in the nucleus
John dalton
First experimental atomic model
Daltons atomic theory
First model to include atoms of each element having different masses
Hans Geiger
Gold foil experiment
Bohrs model of the atom
Helped explain line spectra
10
How many electrons does the d sublevel hold?
73
How many neutrons does the isotope 125/52 Te have
Positive
If an atom loses an electron the atom will have a __________ charge
Magnetic fields
MRI machines make images through changing ________ in an atom
Raymond damadian
Magnetic resonance imaging
Protons/neutrons
Mass number= number of ______+ number of ______
(106.9051+108.9047)/2=107.9
Naturally occurring silver consists of two isotopes: 51.82% Ag (106.9051) and 48.18% of Ag (108.9047). What is the atomic mass of silver
James Chadwick
Neutrons
False
Neutrons contribute to an atoms mass and it's charge
Principal energy levels, electrons
Niels Bohr in his model of the atom proposed the concept of _________ that were envisioned as a set of concentric circular tracks on which ______ orbited
Democritus
Philosophical atomism
Niels Bohr
Planetary model of the atom
Ernest Rutherford
Protons
False
Scientific models are working representations of experimental facts that have been proven to be correct in all cases
Law of definite composition.
Shows that any sample of water always contains 8 g of oxygen for every 1 g of hydrogen
Heisenberg uncertainty principle
States that it is impossible to know both the energy and the exact position of an electron at the same time
Pauli Exclusion Principal
States that no two electrons in an atom can have the same set of four quantum numbers
Valence electrons
The electrons in the outermost energy energy level that are important in bonding are called _________
True
The first quantum number identifies the principal energy level of an electron
True
The general region of space where an electron is most probably found is called an orbital
8
The maximum number of electrons that can be found in any atoms second principal energy level is
Principal (n)
The s,p,d, and f sublevels are identified by __________ quantum numbers.
S
The type of sub level found in all principal energy levels is the _______ sublevel
3/1 H
Tritium is an isotope of hydrogen that has a mass number of 3. What is the isotopic notation?
protons/neutrons
Two different isotopes of a single element would have to same number of ______ but a different number of ______
1s^2 2s^2 2p^6 3s^2 3p^1
What is the correct electron configuration for aluminum?
Electron
What subatomic particle was discovered through experimentation with cathode rays
Electron
Which has the least mass- an electron, proton, or a neutron
3,2,-3,+1/2
Which of the following sets of quantum numbers is impossible?
Louise de Broglie
Who is responsible for proposing the wave nature of the electron
Democritus
Who was the first to refer to the smallest particles composing matter ad an atom?
a) 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^5 b) [Ar] (up and down arrows according to a, but after argon)
Write a) the ground state electron configuration and b) the orbital notation for bromine
a) [Ne] 3s^2 3p^3 b) [Ne] (up down arrows according to a)
Write down a) the the electron configuration and b) orbital notation of 31/15 P
S (six valence electrons)
Write the electron for notation for sulfur
75/33 X
Write the isotopes notation for an atom (use the symbol x) having 33 protons, 42 neutrons, and 33 electrons
Wilhelm Roentgen
X rays
Atomic mass
_________ is determined by the weighted averages of isotopes of an element