Which of these is one similarity of the elements in the first group of the periodic table? A. The elements in the group have similar atomic masses.
B. The elements in the group have the same number of electrons.
C. The elements in the group are very unreactive metals.
D. The elements in the group react with oxygen in similar ways.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.