To come up with the mass of the atom is you add the protons with the neutrons
so you have
60+89=149
Different fabrics rub together, and electrons may rub off
Rock is a combination of two or more minerals, and it does not possess any specific chemical composition. It is present naturally in the environment. Some examples of rocks are limestone, granite, etc.,Limestone may contain minerals like calcite and aragonite. Each mineral has a specific chemical composition with a well defined crystalline structure.
Therefore, the correct option would be a. rock as rock is the naturally occurring solid mass made up of different types of minerals.
The number of protons cause the element in the periodic table of elements to change.
