Which is an example of a chemical change?

A) ripping paper

B) chopping wood

C) baking a cake

D) stretching a rubber band

Recall all the models you described in task 1. Think about the results each model would predict for Thomson's experiment.

How many valence electrons does "Na" (atomic number 11) have?

Which statement is true of all rocks? (1) Rocks contain organic material. (2) Rocks contain fossils. (3) Rocks are composed of minerals. (4) Rocks are formed in layers.

Aqueous acetic acid is neutralized by aqueous potassium hydroxide. True or False

Examples of balanced decomposition reactions

When carbon undergoes sp2 hybridization it forms

Give the formula for molarity

A 54-gram sample of an unknown material has a volume equal to 20 cm3. Based on its density, could the sample be aluminum? Explain

What type of reaction takes place when atoms or molecules rearrange to form new substances?

If you pump air into cycle tyre a slight warming effect is noticed at valve stem why