Structure of Matter

Which of the following is true about how hydrogen and oxygen can combine to form molecules?

• Hydrogen and oxygen can combine in many ways to form different molecules.

• Two atoms of hydrogen are always required to bond with two atoms of oxygen.

• When oxygen combines with hydrogen to make a molecule, water will always be produced.

• Molecules composed of hydrogen and oxygen must have at least four atoms.

Which of the following best explains the relationship between molecules and atoms?

• Atoms are molecules that have a charge.

• Atoms have smaller parts, called molecules

• Molecules are made up of two or more atoms.

• Molecules are atoms that have no mass.

The extended structure of sodium chloride (NaCl) is shown.

Which of the following describes the configuration of Layer 4 of the sodium chloride crystal?

• It will be identical in all of its characteristics to Layer 1.

• It will contain 4 atoms of chlorine and 5 atoms of sodium.

• It will have chlorine atoms in all four of its corners.

• It will have sodium that are bonded only to other sodium atoms.

Above is a table describing the models made by four students. Which of the following is the most accurate evaluation of these models?

• Only Students 1,2, and 4 created acceptable models, since molecules must be made of different types of atoms.

• All of the students created acceptable models because molecules can consist of many different configurations of atoms.

• Only Student 2 created an acceptable model of a molecule, since every molecule must have a balance of atoms.

• All student models are acceptable except that of Student 4, since molecules cant be made of so high a number of atoms.

Graphite is a soft, dark material often used as a lubricant. Diamond is often a clear, hard crystal. Which of the following best explains the difference in these materials?

• The arrangement of the atoms of each one.

• The elements of which each one is made.

• The number of atoms each one is made of.

• The size and shape of the individual atoms.

How many atoms of Nitrogen are in a molecule of Caffeine, which has the molecular formula C₈H₁₀N₄O₂

• 8

• 10

• 4

• 2

How many carbon atoms are in the following:

2C₆H₁₂O₆

• 12

• 2

• 6

• 24

The smallest particle of an element; made of electrons, protons, and neutrons

• Molecule

• Atom

• Compound

• Nucleus

A solid material whose atoms, molecules, or ions are arranged in an ordered pattern

• Compound

• Crystal

• Repeating Subunit

• Atom

Anything that has volume and mass

• Liquid

• Solid

• Matter

• Crystal