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atomic structures

study guide for atomic structure test

QuestionAnswer
What is the symbol used for proton? P+
What is the charge of a proton? 1+
What is the relative mass of a proton? 1 AMU
Where in atoms are protons found? Nucleus
What is the symbol for neutron? N
What is the relative mass of a neutron? 1 AMU
What is the charge of a neutron? 0
Where in atoms are neutrons found? Nucleus
What is the symbol used for electrons? E-
What is the charge of an electron? 1-
What is the relative mass of an electron? 1/1836 AMU
Where in atoms are electrons found? Electron cloud
Who predicted that there were four elements: earth, air, fire, and water? Aristotle
Who concluded that all atoms of the same element have the same mass? Dalton
What subatomic particle did JJ Thomson discover? Electron
Are higher energy levels in excited states or ground states? Excited states
What is the nickname for Dalton's model of the atom? Billiard ball model
What are the three points of Dalton's theory? 1: all elements are made of atoms 2: all atoms of the same element have the same mass 3: compounds contain atoms of more than one element that always combine the same way
Who found/discovered the nucleus? Rutherford
In an atom with a nucleus, where is all the positive charge? Nucleus
What subatomic particle has a negative charge? Electron
What is the atomic number? # of protons and # of electrons
How do you find the number of neutrons in an atom? Neutrons = atomic mass - # of protons
Whats causes an electron to move to a higher energy level ? Absorbing/adding energy
What does Neil Bohr's model look like? Draw or see #25 on study guide
What does the electron cloud model describe? Possible locations of electrons around nucleus
What is the difference between the ground state and the excited state? Ground state: lowest possible energy, most stable Excited state: occurs when atom absorbs enough energy to cause 1 or more electrons to move to an orbital with a higher energy
Created by: 15slkennedy
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