How many stairs did you come across in this building while you were on your way to this interview?

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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it is stable as it is in group 0 which have full outer shells of electrons

the answer is d.) potassium