What is the difference between the substances represented by the symbols Si and SI ?

• They both stand for the same element.

• Si stand for Silicon while SI stand for Sulfur & Iodine.

• Si is a chemical and SL is an element.

• Si stands for silver while SO stands for Sodium.

Tags

NGSS.MS-PS1-1

What elements are in this substance?

• Nitrogen, Hydrogen, Sulfur, Oxygen

• Nitrogen, Helium, Sulfur, Oxygen

• Nitrogen-Hydrate, Sulfur, Oxygen

• Nitrogen, Hydrogen, Silver, Oxygen

Tags

NGSS.MS-PS1-1

What elements are in this substance?

• Silver, Iodine

• Silver, Iodide

• Gold, Iodine

• Gold, Iodide

Tags

NGSS.MS-PS1-1

What elements are in this substance?

• Carbon, Hydrogen, Oxygen

• Carbonide, Hydroxide, Oxide

• Carbon, Helium, Oxygen

• Carbon, Hydrogen, Helium, Oxygen, Calcium

Tags

NGSS.MS-PS1-1

What elements are in this substance?

• Calcium, Carbon, Carbon, Nitrogen

• Calcium, Carbonate, Carbon, Nitrogen

• Calcium, Arsenic, Carbon, Carbon, Nitrogen

• Nitrogen, Calcium, Carbonate

Tags

NGSS.MS-PS1-1

Which Venn diagram best represents the relationship between an element and a substance?

• 
• 
• 
• 

What are three ways that substances can be identified or labeled?

• Chemical Name, Common Name, Chemical Formula

• Scientific Name, Common Name, Mathmatical Formula

• Chemical Name, Ancient Name, Chemical Formula

• Last Name, Middle Name, First Name

What was Mendeleyev’s purpose for reorganizing the periodic table? (choose the best answer)

• He wanted to fit all of the elements on one page instead of in a long line.

• He wanted to put elements with similar characteristics in the same column, leaving gaps for unknown elements.

• He wanted to order the elements from the lightest to the heaviest.

• He wanted to put all the metals on one side of the table and gases on the other.

When Mendeleyev changed the layout, there were gaps (no known element fit in those places). How did the gaps help scientists look for undiscovered elements?

• The gaps allowed future scientists to know what features to look for based on the elements around the gap.

• The gaps did not help future scientists at all.

• The gaps revealed what elements were missing and they filled them in right away.

• The gaps helped the scientist a little bit but they still had to do much research and ended up taking guesses as to what the element was.

What is a chemical reaction?

• a process during which the atoms of a starting substance (reactants) rearrange to form new substances (products)

• a process where two substances mix and always bubble or fizz

• when three substances mix together and make something new

• when an explosion occurs between chemicals

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5