This element is often used to block out dangerous radiation.
a. lead
b. carbon-12
c. uranium-236
d. uranium-238

Water is important for the of cells. a: size, shape, and temperature b: temperature, color, and odor c: color, odor, and size d: shape, temperature, and color

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

What material does not melt at any temperature