Hi Mimi,

Hawaiian Schefflera

Your plant is called a Hawaiian Schefflera and you are definitely over-watering the plant. If the soil is wet and the plant is drooping you may have killed the roots. You should water your Hawaiian Schefflera well and then allow the top 1/3 of the soil to dry out before watering again.( usually at least a week) This might be an inch or two of soil in a small pot and 5 inches or more of soil in a large pot. Green leaves fall off and new growth turns black when a Hawaiian Schefflera is over- watered. Leaves turn bright yellow when it is under-watered. Take your plant out of the pot,  get rid of the wet soil, let it lay out bare rooted over night. Re-pot with fresh dry soil. Be sure there are bottom drip holes in your pot and the plant sits in bright indirect lightVery few houseplants should be placed in direct sun. High light refers only to bright indirect light since direct sun often burns the leaves of indoor houseplants. An area that is too hot and dry encourages Spider Mites and causes blooms to quickly fade. A northern exposure really doesn't provide enough light for high light plants. These plants need to be placed directly in front of an east-facing window, within 1-3 feet of a west-facing window, and within 5 ft. of a south facing window. A high light area has over 300 ft. candles of light..

You can read more about Hawaiian Scheffleras in the Popular HousePlant section of the website.

http://www.houseplant411.com/houseplant/hawaiian-schefflera-plant-care-grow-tips