Chem-Module 7
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Crookes tube | The experimental instrument that William Crookes used to identify cathode rays (also called cathode ray tube)
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| Cathode ray tube | The experimental instrument that William Crookes used to identify cathode rays (also called Crookes tube)
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| Like charges _____ one another | repel
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| Opposite charges _____ each other | attract
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| What are the particles in an atom? | Proton, neutron, electron
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| An atom's atomic number tells you how many _____ it contains. | protons
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| All atoms have an _______ number of electrons and protons | equal
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| Protons are _______ charged | positively
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| Electrons are ________ charged | negatively
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| Neutrons are _______ charged | neutrally
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| Isotopes | Atoms with the same number of protons but different numbers of neutrons
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| Isotopes behave ______ in the their chemistry; the main difference between them is their _______ | identically, mass
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| Mass number | The total number of neutrons and protons in an atom
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| The planetary model of an atoms is also called the | Rutherford model
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| The protons and neutrons in an atom are called the | nucleus
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| Light is made up of _____ and small particles called ______ | waves, photons
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| Particle/Wave Duality Theory | The theory that light sometimes behaves as a particle and sometimes behaves as a wave
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| The high point of a light wave is called the | crest
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| The low point of a light wave is called the | trough
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| Wavelength | The distance between crests (or troughs) of a wave
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| Amplitude | A measure of the eight of the crests or the depths of the troughs on a wave
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| nano means | 10^-9
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| The range of light we can see (the rainbow) is called the | visible spectrum
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| How do you remember which light has the longest wavelength, and the descending order? | ROY G. BIV
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| Physical constant | A measurable quantity in nature that does not change
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| Frequency | The number of wave crests (or troughs) that pass a given point each second
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| Hertz (Hz) means | 1/second
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| When wavelength is ______, frequency is ______. When wavelength is ______, frequency is _____. | large, small; small large
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| All expanses of light are called | the electromagnetic spectrum
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| As a light wave's frequency _______, its energy _______. As its frequency ______ its energy _______. | increases, increases; decreases, decreases
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| As a light wave's wavelength _______, its energy ______. As its wavelength _______, its energy _______. | increases, decreases; decreases, increases
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| Planck's constant is | 6.63 x 10^-34 Hz
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| A scientific instrument that can analyze light and determine individual wavelengths that make it up is called | a spectrometer
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| A spectrometer uses ________ to analyze light | spectroscopy
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| When an electron gets energy, it is | excited
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| When an electron releases energy, it is | de-excited
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| All forms of matter try to stay in their ______ possible energy state | lowest
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| Ground state | The lowest possible energy state for a given substance
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| An atom is mostly made up of | nothing
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| Who discovered protons? | Ernest Rutherford
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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