The answer is 1.98 × 10^22 iron (II) ions
Roof lights, dormer windows or other roof extensions. Planning permission is not required provided that: 1. No part of the roof light, dormer or extension is higher than the highest part of the existing roof.
Usually, elements which share the same group, they have similar properties, here only Lithium and sodium share same group as they both are alkali metals.
So, In short, Your Answer would be option B) Lithium and Sodium
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decalescent energy-absorbing endothermal heat-absorbing endoergic.
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A consumer is like someone who eats out at a restaurant and a producer is like the chef making the food. Also a producer could be a actor and the consumer could be someone watching a movie.
