Staar Science Review

Henry is investigating the properties of elements in section A. What are the general characteristics of elements from section A?

• conducts heat and electricity, shiny, and solid

• mostly gases and are very reactive

• share properties of metals and nonmetals

• liquids that are stable in pure form

Tags

NGSS.HS-PS1-1

Some elements have properties of metals and nonmetals, which make them useful in electronic devices. Where can these elements be found? 

• section A 
• section B
• section C
• section D 

Tags

NGSS.HS-PS1-1

Transition metals are malleable and are found in section B. What is another property of metals in section B? 

• conducts heat
  
• liquid state of matter
  
• highly reactive and never found as a pure element 
• poor conductors of electricity 

Which two sections of elements are mostly likely to react and form chemical bonds with one another? 

• section A and section B 
• section B and section C 
• section C and section D 
• section D and section A 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

CH₄ +2O₂  →  CO₂ +2H₂O 
How many different elements are involved in this reaction? 

• two 
• three 
• four
• five

Tags

NGSS.MS-PS1-1

CH₄ +2O₂  →  CO₂ +2H₂O 
How many atoms are there on the left side of the equation compared to the right side? 

• The left side has more atoms than the right side. 
• The right side has more atoms than the left side. 
• The left and right side have the same number of atoms. 
• It is impossible to know because it depends on the reaction speed. 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

CH₄ +2O₂  →  CO₂ +2H₂O
How many atoms of hydrogen are involved in this reaction? Record you answer below. 

• 6
• 10
• 4
• 2

Tags

NGSS.MS-PS1-1

 In the table above, what would be an appropriate title for column C? 

• Metals 
• Nonmetals 
• Metalloids
  
• Solid Compounds 

 The chart below shows the densities of various substances. Which of the answer choices indicate the mass of 6 cm3 of salt? 

• 0.06 grams 
• 6.0 grams 
• 12.6 grams 
• 81.0 grams 

Tags

NGSS.MS-PS1-2

When comparing two elements on the periodic table, elements in the same ___________ are most likely to have similar chemical and physical properties. 

• group
• period
• area
• section