Which of the following is correct?

gas atoms subjected to electricity emit bright lines of light.

gas atoms absorb white light and emit a continuous spectrum of light.

gas atoms under high pressure emit dark lines against a continuous spectrum.

gas atoms heated to a high temperature emit white light.

What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold

1) this is the structure in the cell nucleus that houses a cell's genetic information

Classify this reaction: 2al+n2-> aln.