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Week Three Science Warm Ups

1. What are the three main subatomic particles of the atom?

Answer: proton, neutron and electron


2. What is an ion?

Answer: An atom that has gained or lost one or more electrons. This gives the atom a positive or negative charge.


3. A compound is matter composed of two or more elements chemically bonded. What is the difference between a covalent bond and an ionic bond?

Answer: covalent - electrons are shared; ionic - electrons are transferred.


4. A mixture is two or more distinct substances that are mixed together but are not chemically bonded. What is the difference between a homogenous mixture and a heterogeneous mixture?

Answer: homogenous - The substances are evenly distributed throughout the mixture. An example would be a solution.
heterogeneous - The substances are not evenly distributed throughout the mixture. An example would be a suspension.


5. If household ammonia has a pH of 12, is it an acid or a base?

Answer: base



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