STAAR Category 1 and 2

How many electrons are in this element?

• 39

• 19

• 20

• 21

Tags

NGSS.MS-PS1-1

Which element does this model represent?

• Nitrogen

• Hydrogen

• Carbon

• Boron

Tags

NGSS.MS-PS1-1

Which pair of properties describes the elements in Group 18?

• they are chemically stable and liquid at room temperature

• they have eight valence electrons and are flammable

• they are magnetic and boil at low temperatures

• they are gaseous at room temperature and chemically stable

Students in a science class prepared flash cards so that they could quiz one another about the arrangement of the periodic table. One of the flash cards contained information about two elements, Element L and Element M.

The students had to use the information on the flash card to determine possible positions of the two elements on a blank periodic table. Which periodic table has the elements placed in locations that match the information on the flash card?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-2

The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed in the image.

Which of these elements is in this group:

• Lithium

• Strontium

• Aluminum

• Silicon

Tags

NGSS.MS-PS1-1

How many total atoms are in the compound C₂H₈O ?

• 11

• 2

• 8

• 1

Tags

NGSS.MS-PS1-1

You know you a chemical reaction has occurred if 

• there is a precipitate.

• there is a color change.

• there is a temperature change.

• All of these answers are evidence.

Tags

NGSS.MS-PS1-2

Does this chemical equation follow the Law of Conservation of Mass?

• Yes

• No

• I don't know

• Maybe

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In this image, the information to the RIGHT of the arrow (in BLACK) is called the_______.

• Product

• Reactant

• Chemical Subscript

Tags

NGSS.MS-PS1-2

Read the following chemical formula: C₆H₁₂O₆. How many hydrogen atoms are in the formula?

• 12

• 6

• 4

Tags

NGSS.MS-PS1-1