What is the molar mass in kilograms of 3.5 moles of CH4 (hint 1 kilogram =1000grams) with explanation​

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.