The table shows chronological events in the life of our Sun, a medium-sized star. Place the missing events into the correct rows of the table. The Sun is a white dwarf with a dim glow. A nebula located in the Milky Way galaxy begins pulling nearby hydrogen atoms into its orbit. The temperature in the core of the nebula reaches 14 million Kelvin. The Sun expands greatly and cools. It is larger and redder.

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.