Use the information and table to answer the following question. The data in the table represents unknown element samples.

Element Type of ion formed in a chemical reaction
Phase at room

temperature

Reactivity
W

positive

solid highly reactive
X

does not form ions

gas non-reactive
Y

negative

gas highly reactive
Z positive liquid

somewhat reactive

Using your knowledge of periodic properties and trends, how would these elements BEST be classified and why?

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.

What would be the radius of the earth if it had its actual mass but had the density of nuclei? express your answer to two significant figures and include the appropriate units.

What is the difference between mass density and weight density?