When elements are arranged according to increasing atomic number, there is a repeating, regular pattern of properties This is called

periodic law

group

periodic table

family

Match each object to its description: a. coma of a comet b. comet tail c. oort cloud haze surrounding a nucleus created by solar wind. hypothetical sphere around the solar system

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

What is the empirical formula for c4h8o2