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When an atom is excited the additional energy causes the elecrons to move up to a ? energy level.
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Higher
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The extra energy is released in the form of ? when the electron fall back down to lower energy levels.
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Light
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The patterns of wavelength produced by the emitted light are characteristics of?
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Are characteristics of that element (fingerprint used to identify a specific element)
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The pattern of lines produced by an element when it is excited is called a? or a? when the light is observed with a diffraction grating or a prism.
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Emission spectrum/line spectrum
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White light from a light bulb or the sun produces a ? looks like a ? when the light is observed with a diffraction grating or a prism.
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Continuous spectrum/rainbow
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When elements combine to form compounds, the atoms may share electrons in covalent bonds, or the atoms may lose or gain electrons , forming ions called either?
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Cations (+) - losing electrons
or anions (-)-gaining electrons |
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When a small amount of salt solution is placed in a bunsen burner flame the ? will produce it will produce a color that is characteristic of the ? present in the salt. why?
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Cation. Because cations turn color in the presence of flame and anions do not.
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Is a flame test quanatative or qualitative? Why?
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Qualitative. Because he flame test is used to detect the presence or absence of a substance.
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What is a qualitative test used for?
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Yo test the quantaty of a present substance in a sample.
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Some substances flouresence (glow in the dark) when?
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When energy is added in the foem of flouresent light.
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Sodium
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Bright yellow/orange (pencil yellow)
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Potassium
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Orange/lavendar
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Lithium
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Ruby red
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Copper
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Blue/Green
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Barium
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Pale Yellow
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