2nd 9 Week Review Part 1

Which of the following is NOT a part of the Nuclear Model's view of the atom?

• Electrons are found in a cloud around the nucleus.

• The nucleus has a positive charge. 

• The nucleus is in the center of the atom.

• Atoms are mostly empty space.

How is the electron cloud model of an atom different from the planetary model?

• The numbers of electrons are different.

• The arrangements of the electrons are different.

• The shapes of the nuclei are different.

• The masses of the atomic particles are different.

What distinguishes each element from all others, and gives it unique physical and chemical properties?

• The number of protons

• The electron configuration

• The number of neutrons

• The element’s universal origin

Which model is represented by discovery 2?

• Nuclear Model

• Planetary Model

• Billiard Ball Model

• Plum Pudding Model

Where is most of the mass of an atom located?

• Evenly spread throughout the atom

• Electron Cloud

• In the nucleus

• In the electron

If an atom temporarily gains or loses one or more neutrons, it is considered a/an ___.

• isotope

• ion

• new element

• metalloid

Which physical property is related to a change in the state of matter?

• Boiling Point

• Acidity

• Combustibility

• Basicity

Which student is conducting an experiment on the chemical properties of a substance?

• The solubility of salt (NaCl) is measured in different amounts of water.

• The odor of sulfur (S) is measured in different indoor environments.

• The acidity of vinegar (C₂H₄O₂) is measured daily for five days.

• The melting point of silver (Ag) is measured at various elevations.

A sample of aluminum has a volume of 3.0cm³ and a mass of 8.1g. What is the density of aluminum?

• 24.3 g/cm³

• 0.37 g/cm³

• 5.1 g/cm³

• 2.7 g/cm³

What is an example of a substance undergoing a physical change?

• Freezing water into ice cubes

• Burning trash

• Mixing baking soda (base) and vinegar (acid)

• Rusting of an iron bike