anonymous
  • anonymous
#1: Which element has the same number of valence electrons as hydrogen (H)? A. helium (He) B. oxygen (O) C. nitrogen (N) D. lithium (Li) ***my answer: D. lithium (Li) is that right?
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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jim_thompson5910
  • jim_thompson5910
Li is in group 1, so that sounds right
anonymous
  • anonymous
#2: What happens to the atomic size of the elements as one goes from the bottom to the top of a group? A. Atomic size stays the same as one moves from bottom to top in a group. B. Atomic size decreases as one moves from bottom to top in a group. C. Atomic size increases as one moves from bottom to top in a group. D. Atomic size changes randomly as one moves from bottom to top in a group. **my answer: C. is that right??
anonymous
  • anonymous
and okay yay :) for #1!!

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anonymous
  • anonymous
what about 2?
jim_thompson5910
  • jim_thompson5910
bottom = heavier elements top = lighter elements (think of it as like the heavy stuff floats to the bottom of the pool while the light/lighter stuff floats to the top) so as you go from bottom ---> top, the size decreases
anonymous
  • anonymous
so my answer is right for #2?? it is C?
anonymous
  • anonymous
and #3: Which of the following places the elements in the correct order of increasing first ionization energy? A. Be, Mg, Ca B. Cl, S, P C. P, S, Cl D. F, O, N ***I don't get this one :( please explain! :)
jim_thompson5910
  • jim_thompson5910
no, bottom ---> top means big ----> small
anonymous
  • anonymous
so which answer was that?
jim_thompson5910
  • jim_thompson5910
it's not C because it's not increasing
anonymous
  • anonymous
so my answer to #2 is this? B. Atomic size decreases as one moves from bottom to top in a group. ??
jim_thompson5910
  • jim_thompson5910
yeah
anonymous
  • anonymous
okay and what about #3? lemme repost it so its easier :P
anonymous
  • anonymous
#3: Which of the following places the elements in the correct order of increasing first ionization energy? A. Be, Mg, Ca B. Cl, S, P C. P, S, Cl D. F, O, N ***I don't get this one :( please explain! :)
anonymous
  • anonymous
do u get #3?
jim_thompson5910
  • jim_thompson5910
have a look at this site http://www.shodor.org/chemviz/ionization/students/background.html
anonymous
  • anonymous
idk still... i use the equation?
jim_thompson5910
  • jim_thompson5910
no look at the chart
jim_thompson5910
  • jim_thompson5910
of ionization energies
anonymous
  • anonymous
oaky so bottom to top, left to right?
jim_thompson5910
  • jim_thompson5910
yeah it looks it
anonymous
  • anonymous
okay, so my answer is C. P, S, Cl ??
anonymous
  • anonymous
it goes left to right in the periodic table.. :/ is that the answer?
jim_thompson5910
  • jim_thompson5910
looks perfect
anonymous
  • anonymous
yay! :) thanks!
anonymous
  • anonymous
yay! :) thanks!

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