U 02: Atoms, Elements, Compounds, Mixtures, Acids/Bases TEST

Which of these phrases best describes the general properties of metals?

• highly reactive, dull, brittle, and good conductors

• shiny, malleable, ductile, and good conductors

• dull, brittle, low melting point, and low density

• shiny, poor conductors, and malleable

To make a pizza, you put sauce and cheese on a crust. Other items you like can also be added. What kind of matter is a pizza?

• element

• compound

• mixture

What does the picture represent? (Hint: Please note the colors and sizes of the circles)

• elements
• mixtures
• compounds

Tags

NGSS.MS-PS1-1

Which of the following statements best describes acids?

• Acids have a pH greater than 7 and taste sour.

• Acids react with metal and have a bitter taste.

• Acids have a sour taste, react with metals, and a pH less than 7.

• Acids taste bitter taste and turn red litmus paper blue.

Which of these common substances is a HOMOGENEOUS mixture?

• fruit salad

• mixed nuts

• cereal and milk

• lemonade

A diagram of the periodic table of elements is shown.

Where on the table would NONMETALS be found?

• A

• B

• C

The circles and dots in the boxes represent atoms of two different substances. Atoms touching each other are considered bonded to each other.

Which box contains a MIXTURE?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

The Periodic Table of Elements is shown in the image. Cesium (Cs), the circled element, is a highly reactive metal.

Which elements have a reactivity similar to Cesium?

(HINT: Remember when we learned about the periodic table we discussed which elements were more similar or closer related than others. Was it COLUMNS or ROWS?)

• barium (Ba) and radon (Rn)

• strontium (Sr) and radium (Ra)

• silver (Ag) and cadmium (Cd)

• sodium (Na) and potassium (K)

What are pure substances?

• elements and mixtures

• elements and compounds

• compounds and mixtures

• homogeneous and heterogeneous mixtures

Which of the following statements about bases is true?

• Bases have a pH less than 7 and taste bitter.

• Bases react with metals and turn blue litmus paper red.

• Bases taste sour and turn red litmus paper blue.

• Bases taste bitter, feel slippery, and have a pH greater than 7.