Homework Help: Chemistry

Posted by Anonymous on Tuesday, September 14, 2010 at 8:25pm.

Oxygen reacts 1:2 with sodium and is a colourless gas; chlorine reacts 1:1 with sodium and is a yellow gas; neon does not reacts with sodium and is a colourless gas. Suppose that a new element , pretendium, has been dicovered, and it is noted that this element reacts 1:1 with sodium and is bright green as a gas.

A) which chemical family would it belong to?

-I think halogens.

B) How many electrons would it have in its outermost shell?

-7?

Chemistry - DrBob222, Tuesday, September 14, 2010 at 9:00pm
I agree with halogens.
I don't agree with -7 electrons; I might agree with 7 electrons.

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