Final Exam

Which of the following is the best description of an element.

• a substance that cannot be broken down into simpler substances

• a naturally occurring mineral made of more than one substance

• a small particle made with a specific chemical composition

• a collection of atoms that have different abilities when joined together

How many of these substances are elements

NaOH Cu H2O N2 H2

• 2

• 3

• 4

• 5

All of the following elements are major components of living things on Earth Except.

• Nitrogen

• Carbon

• Sulfur

• Oxygen

Tags

NGSS.MS-LS1-2

Which of the following would indicate the formation of a new substance

• a liquid turns to a solid

• a sample of metal melts

• Bubbles and fissing occur

• a solid dissolves in a liquid

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following characteristics is shared by all chemical reaction

• produce a precipitate

• show a color change

• release heat energy

• form new substance

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

which of the following correctly lists the three main groups of elements from greatest conductivity to least conductivity?

• Non-metals-Metalloids-metals

• Metals-nonmetals-metalloids

• metalloids-metals- non-metals

• metals-metalloids-non-metals

What physical properties are used to classify elements as metals, non-metals, or metalloids

• color, smell, physical

• Reactivity, streak, hardness

• ability to burn, mass, density

• luster, conductivity, malleability

unlike non-metals, most metals tend to-

• conduct electricity and heat well

• be gases at room temperature

• break easily when hammared

• have less luster and shine

the table provided show the masses and volume of four rocks. which rock has the greatest

rock mass volume

1 6 g 3 ml

2 5 g 2 ml

3 2 g 1 ml

4 1 g 1 ml

• Rock 1

• Rock 2

• Rock 3

• Rock 4

Density is calculated by dividing the mass of a substance by its-

• volume

• weight

• lenght

• temperature