A is correct. If an atom has more protons than electrons it is positively charged, if more electrons than protons it is negatively charged. An equal number of each will make it neutral
Answer:

Explanation:
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In this case, for such calorimetry problem, we can notice that the combustion of the compound releases the heat which causes the increase of the temperature by 11.95 °C, it means that we can write:

In such a way, we can compute the total released heat due to the combustion considering the calorimeter specific heat and the temperature raise:

Next, we compute the molar heat of combustion of the compound by dividing by the moles, considering 1.400 g were combusted:

Thus, we obtain:

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A beta particle is the same as B. An electron. This is termed as such for a specific beta radioactive decay reaction.