In the nucleus of an Adam there are 18 protons and 20 neutrons what are the atomic number and mass number of this isotope

What are the two main categories of non metals

In the formation of potassium chloride, the product, KCl, has less energy than the reactants, K and Cl2. This reaction is.

The ideal gas law equation is PV = nRT. If n, R, and T are kept constant, what happens to the volume if pressure is increased? A) The volume increases B) The volume decreases C) The volume remains unchanged D) The temperature rises

A steak that is well cooked is a chemical change or physical change?

Which of the following does not increase the rate at which a solid dissolves in water? a. raising the temperature of the water b. stirring the solution c. using large pieces of the solid d. crushing the solid

A substance is on its fifth half-life. Which approximates the percentages of radioactive and stable isotopes, respectively? 96.9%; 3.1% 3.1%; 96.9% 12.5%; 87.5% 87.5%; 12.5% Need an answer fast

Which describes an object in projectile motion? Check all that apply. Gravity acts to pull the object down. The object moves in a straight path. The forward velocity of the object is 0 m/s. The object's inertia carries it forward.

How are blood transported in blood?

Is human cloning forbidden and why?

What do we beileve is at the center of the milky way A) two stars that have collided together B) a cluster of stars C) A black hole D) A collapsed planet