Which region of the periodic table of the elements does hydrogen (H) belong to?

a. Metals

B. Metalloids

C. Nonmetals

D. Noble gases

True or false? The formation of a new state of matter is evidence of a chemical reaction

The Ability of a material to be drawn into a thin wire is called?

Classify the possible combinations of signs for a reaction's ΔH and ΔS values by the resulting spontaneityA. ΔH is positive and ΔS is negativeB. ΔH is positive and ΔS is positiveC. ΔH is negative and ΔS is positiveD.

What visible evidence indicates that a solution is saturated?

Which describes how a microwave transfers heat to leftover mashed potatoes? radiation excites the motions of water molecules in the food, raising their total kinetic energy the hot oven comes in contact with the cold food and heat is transferred

Charlotte is planning an investigation to learn how temperature affects the amount of salt that can be dissolved in a liquid. In Charlotte's experiment, which of the following things should she control, or keep the same? A. the type of liquid used B.

Which property ofsulphuric acid makes it suitable to use as a catalyst for the preparation of esters?

Which is an example of a covalent bond? Chlorine accepts an electron from calcium to form a stable bond. Ions in a bar of pure iron are surrounded by a large number of valence electrons.

Which frequency has more energy? (high frequency or low frequency)

What happens to atoms when they form molecules?