Science STAAR Review Chemistry

Which of the following statements best describes the subatomic particle at location X? 

• It has a very large mass and is negatively charged. 
• It has almost no mass and no charge. 
• The charge of the subatomic particle at location x is opposite of the charge at location y. 
• It has a positive charge similar to location y. 

Tags

NGSS.HS-PS1-1

 How does the mass of location y compare to the mass at location x? 

• Location y has a mass multiple thousand times larger than location x. 
• Location y has a mass only slightly larger than location x. 
• Location x and y have the same mass.
  
• Location x has a mass twice as large as location y. 

 What are the names of the two subatomic particles located at y? 

• protons and electrons 
• neutrons and protons 
• neutrons and electrons 
• protons and neutrinos 

Which of the particle in the chart below is a neutron?

• Particle A
  
• Particle B
  
• Particle C
  
• None of the above 

Which of these atoms will be more reactive and why? 

• Atom A, because it has fewer electrons.
  
• Atom A, because it has unequal charges.
  
• Atom B, because it gives up a valence electron. 
• Atom B, because it more neutrons. 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Michael eats a cookie at lunch. Which of the following actions during the digestive process is a chemical change? 

• Michael chewing the cookie before swallowing. 
• Enzymes in Michael’s saliva breaking down the sugar compounds. 
• Michael abdominal muscles pushing the cookie through the small intestines. 
• Small amounts of water being absorbed from the cookie in the large intestine. 

Tags

NGSS.HS-LS1-6

NGSS.HS-LS2-3

What is the best title for the chart below?

• Characteristics of Metals in the Periodic Table

• Items that Conduct Electricity

• Highly Reactive Elements

• Organic Compounds

The tendency of an element to react with other elements to produce compounds.

• Chemical change

• Neutrality

• Reactivity

• Valence

Tags

NGSS.HS-PS1-1

A subatomic particle that has almost no mass and a negative charge.

• Electricity
• Proton
• Electron
  
• Neutron

Tags

NGSS.HS-PS2-5

The number of protons in the atoms of a particular element that is unique only to that element.

• Atomic Mas
• Atomic Number
  
• Proton Number
• Mole