Elements and compounds

- is the simplest form of matter that has a unique set of properties.

• An element

• A compound

• A mixture

- A ...........................is a substance that contains two or more element chemically combined in a fixed proportion.

• element

• compound

• mixture

- Elements can be broken down into simpler substances by chemical means, but compounds cannot.

• true

• false

- Physical methods are used to separate mixture but cannot used to break a compound into simpler substances.

• True

• False

- A chemical change is a change that produces matter with a different composition than the original matter.

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

- The properties of compounds are not quite different from those of their component elements.

• True

• False

If the composition of a material is fixed, the material is a ............................. If the composition of a material may vary, the material is a ....................

• substance/mixture

• mixture/substance

• compound/element

- A periodic table is an arrangement of elements in which the elements are separated into groups and periods based on the increase of mass number from left to right and from top to bottom.

• True

• False

A .......................in the periodic table is the set of vertical column of elements.

• group

• period

• orbital

A .............................in the periodic table is the set of horizontal rows of elements.

• group

• period

• shell