Word Warriors - Quiz #10

an elementary particle present in atoms that orbits the nucleus in numbers equal to the atomic number of the element with a negative charge.

• electron
• element
• compound
• mixture

A scale that measures how acidic or basic a substance is. The pH scale ranges from 0 to 14.

• fish scale
• key scale
• pH scale
• element scale

A property of an ionic compounds (a compound with a positive or negative charge) that break apart in water to form a hydrogen ion.  They measure less than 7 on the pH scale.

• base
• rain
• neutral
• acid

A property of ionic compounds that break apart to form a negatively charged hydroxide ion
(OH^-) in water. They have a pH reading higher than 7.

• basic
• acid
• neutral
• mixture

Of or relating to a solution or compound that is neither acidic nor basic (alkaline).

• acid
• neutral
• base
• compound

A composition of two or more substances that are not chemically combined with each other and are capable of being separated.

• mixture
• compound
• alkalinity
• electron

A substance consisting of atoms of two or more different elements in definite proportions joined by chemical bonds into a molecule. The elements cannot be separated by physical means.

• base
• alkalinity
• mixture
• compound

Any form of precipitation, including rain, snow, hail, fog, or dew, that is high in acid pollutants, especially sulfuric and nitric acid.

• neutral precipitation
• pH scale
• saturated precipitation
• acidic precipitation

the amount of alkali or base in a solution, often expressed in terms of pH.

• neutral
• electron
• alkalinity
• acid rain

any process involving a substance's change from one state (gas, liquid, solid) to another without alteration of the chemical composition.

• physical change
• chemical change
• old-age change
• mechanical change