Boron is one position to the left of carbon on the periodic table. The atomic number of carbon is 6. Given its position on the periodic table what is the atomic number of boron?

The metric unit of electrical power is the watt volt ampere ohm

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

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?