As a mercury atom absorbs a photon of

energy, an electron in the atom changes from

energy level d to energy level e.

Determine the energy of the absorbed photon in

electronvolts.

Why doesn't this aquarium represent a closed system? A. because light, heat, and air can enter and exit B. because it has plastic plants C. because the water is cold D. because there is more than one kind of fishuired.

Electronegativity a. increases across a period and increases down a group. b. decreases across a period and increases down a group. c. increases across a period and decreases down a group. d. decreases across a period and decreases down a group.

What is the volume of a gold nugget that weight 2.20kg. the density of gold is 19g/cm^3 ... ?

In physics class, Anne is designing a small circuit that can operate a mixer. Identify the devices she should use in the circuit. Anne should use a (motor, buzzer, bulb, battery) to transfer electric energy into motion.

7) Cosa rappresenta la seguente formula? Definiscila. I=Q/t

What happens if a hypothesis is not supported?

a group of elements that stretch bend and conduct heat and electricity

A rectangular block has dimensions 2.9 cm x 3.5 cm x 10.0 cm. the mass of the block is 615.0 g. what is the volume and density of the block? (answer it with correct numbers of significant figures)

Which of the following are products of cellular respiration? Sunlight Oxygen ATP Water Carbon Dioxide

Do magnetic field lines ever start or end anywhere?