Four separate experiments were performed to compare the friction of different objects with gravity. One experiment used an ice cube. Another experiment used a rock. The third used an eraser, and the last used a wood block. Each object is placed at
one end of a plastic tray. The end of the tray is lifted slowly. A metric ruler is used to measure the height of the raised end of
the tray at which each object begins to slide.
Identify one similarity between the four experiments

Will mark brainliest how many electrons can be held in the energy level n = 4?

The two naturally occurring isotopes of chlorine are 35cl (34.969 amu, 75.77%) and 37cl (36.966 amu, 24.23%). the two naturally occurring isotopes of bromine are 79br (78.918 rm amu, 50.69%) and 81br (80.916 amu, 49.31%). chlorine and bromine combine to form bromine monochloride, brcl. 1. how many peaks will be present in a mass spectrum for brcl? the four combinations of molecule possible given these four isotopes are: 81br37cl, 81br35cl, 79br37cl, and 79br35cl. 2. what are the masses of the four different brcl molecules? express the masses using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro