Methane is a colorless gas, and diamond is a hard solid. A methane molecule is made of one carbon atom surrounded by four hydrogen atoms. Diamond is an extended structure made of carbon atoms connected in a repeating pattern. Draw a model of a few methane molecules and a model of the extended structure in diamond. Use your model to explain whether methane and carbon are pure substances, such as compounds or elements, or are mixtures.

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

The three types is stress that act on earths rocks are compression, tension, and

Alice did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light. she placed a ray box in front of a mirror. she changed the angle at which the light from the ray box struck the mirror and noted the corresponding angle at which the mirror reflected the light. which of the following is the dependent variable in this experiment? the mirror used to reflect the light the ray box used as the source of light angle at which the light from the ray box strikes the mirror angle at which the mirror reflects the light from the ray box