Unit 2 Reivew: Periodic Table and Chemical Reactions

Which of the following is an example of a chemical change?

• Melting ice

• 1.  Boiling water

• 1.  Rusting of iron

• 1.  Dissolving sugar in tea

Tags

NGSS.MS-PS1-2

1.  What typically occurs during a chemical change?

• 1.  Change in state only

• 1.  Formation of new substances

• 1.  Change in physical appearance only

• 1.  Change in temperature without any new substances

Tags

NGSS.MS-PS1-2

1.  Which of the following is NOT a sign of a chemical change?

• 1.  Production of gas Change in color

• 1.  Production of gas

• 1.  Formation of a precipitate

• 1.  Change in shape

Tags

NGSS.MS-PS1-2

1.  Which of the following processes is a chemical change?

• 1.  Freezing water

• 1.  Cutting paper

• 1.  Burning wood

• 1.  Dissolving salt in water

Tags

NGSS.MS-PS1-2

1.  Which of the following is NOT typically associated with a chemical change?

• 1.  Evolution of heat or light

• 1.  Formation of a new substance

• 1.  Change in physical state

• 1.  Production of a gas

Tags

NGSS.MS-PS1-2

1.   Which of the following is NOT a property of metalloids?

• 1.  They can conduct electricity

• 1.  They are typically shiny

• 1.  They have properties intermediate between metals and nonmetals

• 1.  They are usually brittle

1. Which of the following is a characteristic property of metals?

• 1.  Poor conductivity of electricity

• 1.  Brittle when solid

• 1.  Malleability

• 1.  Dull appearance

1.   Which of the following is a property of most metals?

• 1.  They are good insulators of heat and electricity

• 1.  They are usually dull in appearance

• 1.  They are typically solid at room temperature (except mercury)

• 1.  They generally have low density

1.   Which of the following statements is true about metalloids?

• 1.  They are always found on the far left of the periodic table.

• 1.  They usually have properties that are a mix of metals and nonmetals.

• 1.  They are always gases at room temperature.

• 1.  They are highly conductive and malleable like metals.

1. Which of the following elements is NOT a metalloid?

• Boron

• 1.  Tellurium

• 1. Oxygen

• Antimony