Final Exam: First Semester

Observe the image below. Which statement correctly identifies the subatomic particles that make up an atom?

• Protons + Neutrons & Shells -
• Electrons -, Corks +, & Protons
• Protons +, Neutrons & Electrons -
• Electrons +, Nucleus - & Protons

What is the smallest quantity of an element?

• Compound
• Atom
• Molecule
• Solution

The photograph is of Marie Curie (1867-1934). She showed the existence of the element radium and she produced 0.1 g of the compound radium chloride in 1902 by processing tons of pitchblende ore obtained from mines in Bohemia. What is meant by the term compound?

• A substance made up of two or more different types of atoms mixed together but not chemically combined.
• A substance that cannot be split up into simpler substances by chemical means.
• A pure substance made up of only one type of atom.
• A substance made up of two or more different types of atoms chemically combined.

Which of the following would you consider a blueberry muffin?

• Heterogeneous
• Homogeneous
• A Solution
• An Element

Rare Earth elements are important to modern life for which of the following reasons?

• National Security
• Energy Independence
• Environmental Future
• All of the Above

Which statements correctly describe metals on the periodic table?

• There are more non-metals than metals.
• There is a stair step pattern formed by the noble gasses.
• There are more metalloids than non-metals.
• There are more metals than nonmetals.

Which of the following diagrams BEST represents a model of particles in gas?

• A
• B
• C
• D

A student places objects in a bucket of water to determine if they will float. Which set of items from the list is LESS dense than water?

• Plastic paper clip, penny and cork
• Toothpick, metal spoon and plastic paper clip
• Metal spoon, vegetable oil and penny
• Toothpick, cork and vegetable oil

This sphere includes the continents, the ocean floor, all the rocks on the surface, and all of the sand in the deserts.

• Biosphere
• Geosphere
• Atmosphere
• Hydrosphere

Which statement describes an action that most likely resulted in a chemical reaction?

• A pan of water was heated on a stove, and steam formed.
• A liquid was mixed with another liquid, and a precipitate was formed.
• A liquid was sprayed into the air, and a sweet odor was smelled.
• A child blew through a wand filled with soap, and bubbles were produced.