Need right now, please help :)

Two planets are orbiting a star. Planet A is two times closer to the star than planet B. Which planet orbits at a higher speed?
a.) Planet A
b.) Planet B
c.) they both orbit at the same speed

Based on the law of conservation of energy, which statement is false? answer- energy is lost when machines dont work right

Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle

Using the periodic table, complete the table to describe each atom. type in your answers.a ? b? c? d? e? f?