Generally, when going from left to right across a period on the periodic table:
atomic radii decrease
ionic radii increase
electronegativity decreases
valence electron number decreases

Compare and contrast physical changes with chemical changes.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.