What is a group in the periodic table of elements? question 6 options: the elements that have the same atomic number the elements that have similar densities and atomic sizes the elements that are in the same column of the periodic table of elements the elements that are in the same row on the periodic table of elements

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h

This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.