P Sci Test 4 Review

What is a group of two or more atoms linked together by chemical bonds?

• Molecule

• Mixtures

• Ionic bond

• Polar

What are substances composed of several elements or compounds that are physically mixed but not chemically united?

• Molecule

• Mixtures

• Ionic bond

• Polar

What type of chemical bond within a molecule involves the TRANSFER of electrons from one atom to another?

• Ionic bond

• Covalent bond

• Polar

• Mixtures

What is the ability of one substance to dissolve in another substance?

• Solubility

• Mixtures

• Ionic bond

• Polar

What is the pH of a neutral substance?

• 7

• Less than 7

• More than 7

• 8

What is the pH of an acid?

• 7

• Less than 7

• More than 7

• 8

What is a substance composed of different types of atoms linked together chemically?

• Compound

• Element

• Mixture

• Solution

What law states that heat and other natural processes in a system always tend toward less usable energy and greater disorder?

• First law of thermodynamics

• Second law of thermodynamics

• Third law of thermodynamics

• Law of conservation of energy

What type of chemical bond within a molecule involves the SHARING of electrons between atoms?

• Ionic bond

• Covalent bond

• Polar

• Mixtures

What are simple carbohydrates containing up to a dozen carbon atoms?

• Sugars

• Starches

• Fibers

• Proteins