Periodic Table & Matter

Which statement best explains how periods on the periodic table are organized? 

• increasing atomic number from left to right
• increasing number of neutrons from left to right
• decreasing number of electrons from left to right
• decreasing atomic mass number from left to right

An ice cube is put into a heated pan. What will most likely happen to the molecules in the ice as the ice is heated?

• The molecules will begin to move slower. 
• The molecules will begin to move faster. 
• The molecules will begin to increase in density. 
• The molecules will begin to condense in the air. 

Tags

NGSS.MS-PS1-4

Which pair of elements has the most similar properties?

• Li and B
• I and Ca
• K and He
• N and P 

If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products? 

• 12 atoms of carbon (C)
• 6 atoms of carbon (C)
• 3 atoms of carbon (C)
• 2 atoms of carbon (C)

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which shows one example of a physical change and one example of a chemical change?

• boiling water and melting wax
• rusting iron and baking a cake
• dissolving powder and shredding paper
• freezing water and burning coal

Tags

NGSS.MS-PS1-2

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

• During a chemical reaction, the total amount of matter stays the same.
• During a chemical reaction, matter is destroyed.
• During a chemical reaction, one or more new substances are formed. 
• During a chemical reaction, the total number of atoms increases. 

Tags

NGSS.MS-PS1-5

In which group are the most reactive metals located?

• Group 1 (IA)
• Group 2 (IIA)
• Group 17 (VIIA)
• Group 18 (VIIIA)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which two elements are most likely ductile?

• C and P
• Zn and N
• Ag and Au
• Si and Ne

Two clear solutions are mixed together in a beaker. Which would most likely indicate a chemical change had occurred?

• increase in volume of the liquid in the beaker 
• change of color of the liquid in the beaker
• separation of the two liquids within the beaker
• increase in mass of the liquid in the beaker

Tags

NGSS.MS-PS1-2

Which changes when gases condense to form liquids?

• physical mass
• physical state
• chemical reactivity
• chemical composition

Tags

NGSS.MS-PS1-4