For a1, its atomic number is 13 and its mass number is 27 how many neutrons does it have?

How did Democritus describe oil atoms

How is the horse leg like the human arm?

The half-life of a certain radioactive element is 1250 years. what percent of the atom remains after 7500 years?

The main issues that have put some ocean population in peril include all of the following except ___. A. Warmer sea waters temperature B. Lower pH values of seawater C. Expulsion of tiny algae D. The color of algae is changing

How are most animals classified in reference to symmetry? assymetry bilateral symmetry monolateral symmetry radial symmetry

What is the density of a block of marble that occupies 311 cm cubed and has a mass of 853 g?

Explain how pressure affects a scuba diver rising to the surface

1) What is the mass of 5.24 moles of Fe504-7H2O?

The name given to the change of state from gas to liquid is

How many molecules of carbon dioxide, CO2, are present in 388.1 grams?