HURRY PLEASE!! An atomic physicist determines that an atom is composed of 8 positively charged particles and has a mass of 15 amu. Which is the best conclusion that can be drawn? A)The atom has 7 neutrons and 8 protons.
B)The atom has 7 electrons and 8 protons.
C)The atom has 8 neutrons and 7 electrons.
D)The atom has 8 electrons and 7 protons.

Working with si (metric) units for each of the following commonly used measurements, indicate its symbol. liter gram milliliter kilogram meter centigram milligram centimeter kilometer second millimeter milliseconds

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397

Calculate the mass of carbon in 97.0 g of sucrose c12h22o11