8th Grade Science Curriculum Framework Quiz

What are atoms composed of?

• Cells

• Molecules

• Subatomic particles

• Chemical bonds

What does the electron cloud model represent?

• The exact location of electrons in static orbits

• The 3-D nature of the atom

• A dense nucleus of protons and neutrons surrounded by regions of space where electrons are most likely to be found

• The quantum mechanical model

What can students use the periodic table for, as mentioned in the text?

• To find the atomic number of elements

• To predict the chemical and physical properties of main group elements

• To understand the structure of the atom

• To learn about the history of atomic theory

What is the central idea reflected in the periodic table?

• The number of protons in an atom

• The types of chemical reactions

• The subatomic particles and their properties

• The molecular composition of compounds

What do atoms consist of?

• Protons, neutrons, and molecules

• Protons, neutrons, and electrons

• Neutrons, electrons, and isotopes

• Protons, isotopes, and electrons

What can the organization of the periodic table predict?

• The color of elements

• The smell of elements

• The metallic character and tendency of main group elements to form ionic or covalent bonds

• The exact temperature at which elements melt

Elements in the same vertical column of the periodic table have the same number of what?

• Protons

• Neutrons

• Energy levels

• Valence electrons

According to the kinetic molecular theory, what is always in motion?

• Only molecules

• Only atoms

• Atoms and molecules

• Electrons within atoms

What factor is important in determining the physical state of a group of atoms or molecules?

• Their color

• Their relative amount of kinetic energy

• Their position in the periodic table

• Their electrical charge

How can the changes of state that occur with variations in temperature or pressure be described?

• By using the periodic table

• By using the kinetic molecular theory

• By using the law of conservation of mass

• By using the principle energy levels