6th grade science review

This is the amount of "stuff" in an object

• weight
• gravity
• mass
• volume

The smallest part of matter is:

• a cell
• an atom
• a molecule
• a compound

Which of the following are chemical properties?

• volume and mass
• flammability and reactivity
• boiling point and freezing point
• color and odor

Which of the following is a compound?

• H₂
• O₂
• N₂
• NaCl

Which are examples of molecules?

• O₂
• H₂O
• C₂NO₂H₅
• All are examples of molecules

O₂ (oxygen gas) is an example of:

• a molecule
• a compound
• a mixture
• a molecule and pure substance

This type of chemical bond occurs when valence electrons are shared between atoms.

• covalent bond
• ionic bond

In this type of chemical bond valence electrons are transferred or stolen from one atom to another.

• ionic bond
• covalent bond

This is a model of an atom of:

• Oxygen- atomic # 8
• Carbon- atomic #6
• Neon- atomic #10
• Helium- atomic # 2

Which of the following are examples of physical properties?

• reactivity and flammability
• mass and density
• combustion and reactivity
• toxicity and flammability