Answer:
A) Neutral.
Explanation:
Protons are positively charged and electrons are negatively charged, while neutrons have no charge. In a "neutral atom", the number of protons must be equal to the number of electrons, otherwise it would not be neutral.
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Answer:
130,000 cubic centimeters
Explanation:
The volume of a box is its length multiplied by its width multiplied by its height (lwh). 423 times 12 times 25 is 126,900. When multiplying, the number of significant figures is the same as the number with the least number of significant figures. The correct number of significant figures in this example is 2, so 126,900 would need to round up to 130,000 in order to have 2 significant figures.
The question that you asked has already been answered
I'm assuming you meant 10^(14) instead of 1014
if so, then the energy of one photon will be be 4.76×10^(-19) Joules
