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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<h2>377 kPa</h2>Explanation:
The original pressure can be found by using the formula for Boyle's law which is
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we're finding the original pressure
150 kPa = 150,000 Pa
We have
We have the final answer as
<h3>377 kPa</h3>Hope this helps you
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