Which of these discoveries contradict components of dalton’s atomic theory? check all of the boxes that apply. atoms contain smaller particles: protons, neutrons, and electrons. atoms of a given element can bond to other atoms only in specific ways. atoms of a given element can have different numbers of neutrons. nuclear reactions can change an atom of one element into an atom of another element. all atoms of a given element have the same number of protons.

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers distance

An atom that has gained or lost electrons is called an _