Simple. The atomic number is the number of protons (12) and the mass number is the number of neutrons and protons combined. So you'd subtract 12 from 25 (25-12=) and that'd get you 13 as your answer. If you need to find the number of electrons, it'll be the same as the number of protons unless it has a certain charge and if it does, if it's positive it has more protons (+) than electrons (-), if it is negative it has more electrons (- negatively charged) than protons (+ positively charged)
Answer:
Chemistry is one of the causes for global warming, and in some cases it can even cause certain illnesses.
Iron radiates energy faster than lead. Iron has higher heat conductivity than lead.
Black and Grey both work but Black is the most popular choice to get the greatest contrast between the print and a white surface
The third significant figure in the given question is 4.
<h3>What exactly are significant figures?</h3>
The number of digits in a value, often a standard measure, that make a contribution to the precision of the value is referred to as significant figures. The first non-zero digit is used to begin counting significant figures.
All zeros to the right and left of a decimal point are never significant. For example, the number 0.00328 had three significant digits.
It is critical to estimate ambiguity in the final result, which is where significant figures come into play.
Thus, the third significant figure in the given equation is 4.
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