An isotope of radon has 86 protons and 137 neutrons. What is the mass number of this isotope?

How many molecules of sodium nitrate are produced when 17 g of sodium azide, NaN3, react according to the following equation: NaN3 (aq) + AgNO3 (aq) - --> AgN3 (s) + NaNO3 (aq) Question options: 3.7x1023 1.6 x 1023 1.85x1023 6.02x1023

What process is the method by which a neutral object obtains an electrical charge? A) convection B) discharge C) induction D) radiation

Which chromosome cause apples to be a 'paticular' color?

Why does ionization energy tend to increase as you move across a period

Calculate the external pressure that must be applied to seawater 1.14 M total ion concentration

Two examples of common items that use chemical change

Which has more mass, a 28.0-cm3 piece of lead or a 16.0-cm3 piece of gold? the density of lead is 11.4 g/cm3; the density of gold is 19.3 g/cm3?

If the body is a city what would it be

What is the empirical formula for a compound that is 29.44/% calcium, 23.55% sulfur, and 47.01% oxygen? This compound is a common ingredient in plaster

Through which medium do sound waves travel most slowly?