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sara12345

  • 3 years ago

as we move from left to right across a period how density changes

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  1. sara12345
    • 3 years ago
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    1. increases 2. decreases 3. remains constant 4. no particular trend

  2. UnkleRhaukus
    • 3 years ago
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    density is mass per unit volume

  3. .Sam.
    • 3 years ago
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    Density increases. Atomic radius decreases from left to right across a period because: 1) Electrons are being "added" into the same shell, (you know that the shell number doesn't increase across a period) 2) The proton number and number of electrons increases across a period, this causes greater attractive force between positive and negative charges, resulting in decrease in atomic radius as mass increases, therefore greater density.

  4. sara12345
    • 3 years ago
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    mass increases but radius decreases since d = m/V density increases i get it thank you very much !

  5. UnkleRhaukus
    • 3 years ago
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    i do not agree with options 1,2,3,4

  6. sara12345
    • 3 years ago
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    but the right side we have gases but here i think they're asking only for atom i hope, not the molecule level

  7. sara12345
    • 3 years ago
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    why

  8. UnkleRhaukus
    • 3 years ago
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    http://periodictable.com/Properties/A/Density.st.html

  9. sara12345
    • 3 years ago
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    oh it shows left and right groups have least density

  10. sara12345
    • 3 years ago
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    some trend still exists, as we move from left to right, s->p->d, upto the last group in d block, the density is increasing

  11. sara12345
    • 3 years ago
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    looks non-metals have less density again breaking the general increasing density trend

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