Chapter 11 - Modern Atomic Theory Flashcards
(19 cards)
__________ is the distance between two consecutive peaks in a wave
Wavelenght
What are the three characteristics of electromagnet radiation?
- how energy travels
= wavelength, frequency & speed
__________ is how many waves will pass a given point/second
frequency
_______ is how fast a peak moves
speed
What are photons?
beams of light - tiny packets of energy
What does it mean when we say tha energy levels of hydrogen atoms are quantized?
that means only certain values are allowed
they emit photons of certain energies, thus light
they have discrete energy levels
What is another name for the probability map of an electron?
an orbital
Does an orbital dictate where the electron will be?
90% of the time it will
T/F - within an orbital, do the electrons move in the same direction?
F
They spin in opposite directions
How many lobes does a 2 p orbital have?
3
Describe the distinguishable features of the Bohr model
That electrons traveled in orbitals
his model only worked with the hydrogen atom
electrons could jump into higher energy levels when they receive energy
What is a valance electron? And what is it’s significance?
The valance electrons are the electrons on the outermost principal energy level
They are the electrons involved when atoms attach to each other - forming bonds
Except for helium, the atoms of elements in the same group have the same number of ________ ina given type of orbital
electrons
What are core electrons?
inner electrons not involved in bonding
What are probability maps?
the likeliness that an electron will be at a certain place - in their orbitals
What is the Pauli exclusion principal?
an atomic orbital can hold a max of two electrons, and those two electrons must have opposite spins
Which group of elements are inert?
the noble gasses
What are the properties of metals?
conductivity
lustrous
change shape without breaking
What are the tendency of the electrons of metals?
to loose electrons to from positive ions
