how many known elements have atoms, in their ground-state, with valence electrons whose quantum numbers are n = 6 and l = 1?

The distance d that a car can travel in a certain amount of time t can be found by multiplying the rate of speed r by the travel time. if a car has already travel 4 miles, the formula for the total distance travel is d= rt + 4. which of the following gives the value of r, in terms of d and t?

How do you work out 21.3-8= show your working. plz

Which of the following is a characteristic of the coverdell education savings account