If the atomic number of an element is 8 and its mass number is 20, how many neutrons are in the atom's nucleus?

What are some organic compounds? is grass an organic compund?

Which is a concern about mining for uranium

When water (H20) freezes into ice, some of its properties have changed but the [blank] of the H20 is the same. The answer choices are: A. Identity B. Energy C. Arrangement D. Property

What best describe the location of an atom's electrons

If you wanted to learn more about what it was like to work in a family of scientists, whose life would you research? A. Subrahmanyan Chandrasekhar's B. Marie Sklodowska-Curie's C. Ibn al-Haytham's D. Christian Dippler's

The highest peak in the vicinity (<100 kilometers) of Mt. Kilimanjaro is located to the: a. north. b. west c. east. d. south. e. northeast

Which of the following lists contains only examples of renewable sources of energy? A. wind, tidal, geothermal, and hydroelectric B. coal, solar, wind, and biomass C. fossil fuels and nuclear energy D. hydroelectric, petroleum, solar, and wind

The part of a longitudinal wave that is least dense is called a (n) rarefaction refraction contraction compression

if 100 grams is equal to 1 newton of force, and the water displaced by an object would have a mass of 40 grams, what is its buoyant force on that object?

A charge if 2 nC is placed 10cm to the right of a conducting sphere with a diameter of 2 cm. A charge of 5 nC is placed 10 nC to the left of the same sphere. determine the charge at the center of the sphere.