An element that is a very reactive gas is most likely a member of what group?

Ways that industry and agriculture use physical properties to separate substances

The ability to make things happen is also called a. heat b. force c. matter d. energy

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g