Each color of light has a specific amount of energy. A hydrogen atom will absorb and emit red, blue-green, blue, and violet light but not
yellow or orange light. Explain this phenomenon.

Afamily is one another name for a group on the table of elements.

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.