The temperature rose. so kinetic energy increase. the answer is A. concentration will not affected
The density would be 2.5g/cm^3
The removal of trees would most likely decrease the amount of carbon in the atmosphere.
Please note that it is useful to add the options provided with the question, in order to get a most accurate answer and have your question answered quicker.
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That element is manganese. As they are in same horizontal row (period) and are next to each other. That is why they show same properties.
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