Which statements are true concerning elements in the same group of the periodic table

Write two balanced equations 1. dissolving of solid sodium hydroxide in water 2. the reaction of sodium hydroxide solution with hydrochloric acid

Often on a topographic map, every fifth contour line is darkened. what is this line called? a. key b.slope c.benchmark d. index contour

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen