Which type of energy moves from one object to another by touching? conduction
convection
radiation

The velocity of car is 80.0 miles per hour. what is the velocity of car in meters per second? (1 km -0.621 miles) m/s

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.

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