Wed Sept. 25

A student tested the conductivity of four elements using an incomplete electrical circuit. When the element is placed in the circuit, the bulb lights up brightly, lights up dimly, or does not light up at all based on the element’s ability to conduct electricity. The table below shows the results of her investigation. Based on the results of the conductivity test, which element is classified as a metal? 

• Hydrogen
• Arsenic
• Krypton
• Copper

Tags

NGSS.MS-PS1-2

Which element is a metalloid?

• Titanium
• Selenium
• Potassium
• Polonium

Which of the following is a pure substance?

• O₂
• Al₂CO₅
• C₆H₁₂O₆
• SiO₂

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

Which table below correctly lists the properties of metals and nonmetals? *

• A

• B

• C

• D

Can be found on the periodic table

• Element
• Compound
• MIxture

When an object shatters when struck by a hammer.

• luster
• malleable
• brittleness
• ductile

What is krypton?

• element
• compound
• mixture

How many different elements are in this chemical formula: C₂H₂ClK₃

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1

Some students conducted a laboratory investigation to learn more about the physical properties of different elements. They observed four samples and recorded their observations in the table . Based on these observations, which sample is most likely a nonmetal?

• Sample 1
• Sample 2
• Sample 3
• Sample 4

Which of the following is a pure substance?

• CO
• C0₂
• Co
• H₂O

Tags

NGSS.MS-PS1-1