Atomic Structure and History - Test 4 Flashcards
What is an example of a cathode ray tube?
Television
Who discovered electrons?
Thomson
What does the word “atom” mean in Greek?
Indivisible
Who was the first person to come up with the theory of atoms?
Democritus
What is a common use for microwaves?
Cooking food
Who proposed the plum pudding model?
Joseph Thomson
What animal can see infrared light?
Snakes
What is the section of the electromagnetic spectrum that humans see?
Visible light
What are the waves on the electromagnetic spectrum?
Radio waves Radar waves Microwaves Infrared waves Violet light waves UV waves X-rays Gamma rays
What is the most dangerous electromagnetic wave?
Gamma rays
What is the positively charged electrode on a cathode ray tube called?
Anode
What is today’s model of an atom called?
Quantum mechanical model
What were the scientist who studied electron interested in?
electricity
In the quantum mechanical model what is true about the electrons?
They can be found inside the atomic orbitals - - but the specific location cannot be found
Be able to label a wave
Look at your notes
Be able to draw a p and an s orbital
Look at your notes
Be able to draw the plum pudding model of an atom (label the + and - charges)
Look at notes
What was the purpose of the flame lab?
Use your notes
Where do UV rays come from - - how do thy harm us?
From the sun - - they changes our DNA
How do microwaves cook food?
Use your notes
What experiment did Rutherford used to create his model of the atom?
Gold-foil experiment
Are line spectra the same for every element?
NO
Did Rutherford discover the proton?
YES
Can atoms be broken down into smaller parts?
NO
Are ALL of Dalton’s atomic theory applicable today?
NO
EC microvwaves are a great way to heat up hot pockets?
NO
Are infrared waves used in heat sensing?
YES
Are Gamma rays less dangerous than infrared waves?
NO
Do electrons transport instantaneously in the quantum mechanical model?
YES
Where do UV rays come from? How do they harm us?
From the sun - - they change our DNA and can cause skin cancer
How do microwaves cook food?
Excite food molecules which excites each other
What was the purpose of the flame test lab?
To look at electron transitions - which colors each element will produce - how they are different
What is the negatively charged particles?
Electron
What is the weakest type of radiation?
Radio waves
When can the only small strip of light are able to be seen?
Emission Spectrum
What is the glowing beam that travels from cathode to anode?
Cathode Ray
Who is credited for discovering the atom?
Dalton
Who is credited with discovering the electron?
Thomson
What is the term for length from crest to crest on a wave?
wavelength
What is the most powerful and most dangerous type of radiation?
Gamma ray
What are electromagnetic waves that travel in a vacuum at 3.00 x 10(8) m/s?
Light
What is the term for the amount of waves that pass through a single point in a second?
frequency
What is the subatomic particles with no charge?
Neutron
What is the term for all the colors of the rainbow?
Continuous spectrum
What is the lowest part of the wave?
Trough
What is used to separate light into separate wavelengths?
Diffraction grading
What is the light on the electromagnetic spectrum we can see?
Visible light
What is the area around the nucleus where the electron is likely to be?
Atomic orbital
What did Democritus contribute to atomic theory?
First to theorize about an atom - but did not use science
Said that atoms were indivisible
What did Rutherford contribute to atomic theory?
Discovered the proton
Used Gold foil experiment
Planetary model
What did Thomson contribute to atomic theory?
Discovered the electron with cathode rays
Created the plum pudding model
What did Dalton contribute to atomic theory?
Credited with discovery of the atom - and used science
Wrote an atomic theory
