anonymous
  • anonymous
What ion will be formed by the selenium atom shown below when it has a stable set of valence electrons? Selenium atom A. Se6+ B. Se2+ C. Se6− D. Se2− @inkyvoyd
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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inkyvoyd
  • inkyvoyd
selenium is in group 16 which means it has 6 valence electrons...
anonymous
  • anonymous
so its C?
inkyvoyd
  • inkyvoyd
no

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More answers

inkyvoyd
  • inkyvoyd
it's definitely not c
inkyvoyd
  • inkyvoyd
is it easier to lose 6 electrons or to gain 2 electrons?
anonymous
  • anonymous
wait.. i dont get it
anonymous
  • anonymous
ohhhh ok
inkyvoyd
  • inkyvoyd
i'll lead you through this, but you can't jump to conclusions
anonymous
  • anonymous
alright.
anonymous
  • anonymous
electrons means negative subatomic particles. so isnt the answer between c and d?
inkyvoyd
  • inkyvoyd
okay. an atom can either lose or gain electrons. an atom always wants to get 8 valence electrons. this atom is in group 16 which means it has 6 valence electrons so it wants to get to 8 valence electrons it can either lose 6 or gain 2. What is going to happen?
anonymous
  • anonymous
its going to gain 2 because its easier?
inkyvoyd
  • inkyvoyd
yes. if you gain 2 electrons what does that mean in terms of charge? Remember that a normal atom has a neutral charge of 0.
anonymous
  • anonymous
arg. i dont know. the charge increases?
inkyvoyd
  • inkyvoyd
No. You were right. electrons are negatively charged subatomic particles (charge is -1). You had a neutral atom to start with, and all of a sudden you have 2 of these negative electrons. What is the charge?
anonymous
  • anonymous
ok so the charge decreases to 6?
inkyvoyd
  • inkyvoyd
No. you started with zero (neutral atom). You gained 2 electrons. 1 electron holds -1 charge. What does that mean?
anonymous
  • anonymous
ummm means that the charge is -2?
inkyvoyd
  • inkyvoyd
correcto.
anonymous
  • anonymous
so the answer is D.
inkyvoyd
  • inkyvoyd
i'll leave that for you to figure out
anonymous
  • anonymous
alright. thank you for the help :)
inkyvoyd
  • inkyvoyd
:)

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