Question

Please name the element:
A light element in period-3 with a neutron/proton ratio around 1.
Best answer with proper explanation will be marked Brainliest.

Answer 1

Answer:

sodium

sister

this is correct answer

Answer 2

Answer:

As we move across a period, radius decreases and no of protons increases so density increases. So lightest elements are found at the extreme left of the period.

So lightest element in period 3 is Na which have 11 proton and 12 neutron.

Explanation:

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