The base ( foundation ) of building is made wider. Why ?

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Amass weighing 24 pounds, attached to the end of a spring, stretches it 4 inches. initially, the mass is released from rest from a point 8 inches below the equilibrium position. find the equation of motion. (use g = 32 ft/s2 for the acceleration due to gravity.)

Which is the most accurate name for the ionic compound cas?