Which metal in Period 5 is very reactive and has two valence electrons in each atom?
2 answers:
<u>Answer:</u> The correct answer is Strontium.
<u>Explanation:</u>
Reactivity of an element is defined as the tendency to loose or gain electrons. Reactivity decreases as we move from left to right in a period and it increases as we move from up to down in a group.
A metal which belongs to Period 5 and has 2 valance electrons is Strontium. This element belongs to Group 2.
The electronic configuration of strontium (Sr) =
Hence, the correct answer is Strontium.
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<u>Answer:</u> The reactant ratio in the given chemical equation will be:
<u>Explanation:</u>
Mole ratio is defined as the ratio of the amount of moles of two substances that are participating in a chemical reaction.
In the given chemical equation:
The reactants are Fe and and the product is
The mole ratio is basically the stoichiometric ratio of the chemical compounds taking part in a chemical reaction.
The mole ratio of reactants is stoichiometric ratio of Fe and , which is:
Hence, the reactant ratio in the given chemical equation will be: