Question

If an object has a volume of 2 milliliters and a mass of 10 grams, calculate the density of the object.

If a neutral atom has a mass of 15 amu and an atomic number of 7, determine the number of protons, neutrons, and electrons in the atom.,

Answer 1

Density = mass/volume 10g/2mL=5g/mL Atomic mass= protons + neutrons Atomic number=protons In a neutral atom, electrons = protons 15 amu-7 atomic number = 8 neutrons, 7 protons and 7 electrons