Element Z consists of 5% of atoms with a mass of 176.0 amu, 19% have a mass of 177.0 amu, 27% of the atoms have a mass of 178.0 amu, 14% have a mass of 179.0 amu, and the rest have a mass of 180.0 amu. Determine the average atomic mass of element Z rounded to four digits and use the periodic table to identify the element.

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line