Mod J, Unit 1, Lesson 2: Atoms and Elements

What is the smallest unit of matter?

• molecule

• atom

• compound

• element

What describes an atom? Choose all that apply

• a pure substance located on the periodic table

• the smallest unit of an element that maintains properties of the element

• all atoms have the same chemical properties

• Combine to make all the substances on earth

What's an element? Choose all that apply.

• An element is a pure substance that cannot be broken down or separated into simpler substances by chemical means

• An element is always a metal

• An element is atoms with the same physical and chemical properties.

• An element is the smaller than an atom

What is the formula to find an object's density?

• volume x mass =

• mass/ volume =

• mass x volume =

• volume/ mass =

How could you identify if an unknown object is made up a pure element?

• Measure its mass

• Measure its mass and volume

• Measure its mass and volume then calculate its density. Then compare the density of the element to identify the element.

• Measure its atomic mass

How are elements organized on the periodic table?

• alphabetically

• density and date of discovery

• atomic number and their properties

• atomic mass and melting point

Groups on the Periodic Table have similar

• number of atoms

• properties

• atomic masses

• atomic numbers

What is Carbon's atomic number?

• 12.01

• C

• carbon

• 6

What is the atomic mass of this element?

• 12.01

• C

• carbon

• 6

What is this elements atomic symbol?

• 12.01

• C

• carbon

• 6