What are the observed periodic trends in electron affinity? check all that apply. check all that apply. for main-group elements, electron affinity generally becomes more negative as you move to the right across a row for main-group elements, electron affinity generally becomes more positive as you move to the right across a row there is not a corresponding trend in electron affinity going right across a row for main-group elements, electron affinity generally becomes more negative as you move down a column for main-group elements, electron affinity generally becomes more positive as you move down a column there is not a corresponding trend in electron affinity going down a column

What are the trends and exceptions to the trends in electron affinity? Check all that apply.

a *The electron affinities of the elements in Group 17 are larger (more negative) than the elements in Group 1.

b Electron affinities increase (become more negative) down a group.

c *Elements in Group 14 have larger (more negative) electron affinities than elements in Group 15.

d Elements in Group 2 have very large electron affinities.

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answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).