Identify each of the following as element, compound, homogenious mixture or heterogenios mixture.

a. milk

b. iron nail

c. glass

d. sugar

e. bottled spring water

f. distilled water

g. air

h. alloy bicycle frame

i. propane

j. baking soda

When a nucleus has to many protons, it can absorb an electron and create

Which of the following penetrates matter farther and deeper than the others? Α. alpha particles B. beta particles C. gamma rays D. X-rays

Which of the following elements is an example of a metalloid? Silicon Sodium Silver Platinum

All substances have characteristic properties. If one of these properties can be observed without changing the identity of the substance, it must be a chemical property. biological property. universal property. physical property.

Which of these is an example of a physical change! A baking a cake B toasting bread C grinding pepper D lighting up a grill

Hydrogen sulfide gas and sulfur dioxide gas react to form solid sulfur and water. If 10.0g of gaseous hydrogen sulphide is mixed with 10.0g of gaseous sulfur dioxide, how many grams of solid sulfur can form?

What do scientists do during data collection? O A. Analyze information to form a summary B. Gather information during an experiment C. Observe and ask scientific questions O D. Design an experiment to test a hypothesis

Organic molecules always: A. contain carbon. B. contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio. C. are produced by living organisms. D. dissolve in water.

Whats the scientific notation of 0.00000923

A catalyst increases the rate of a chemical reaction by