Q: What is transferred in an acid-base reaction Choices: - bonding ion - friendly ion - calcium ion - hydrogen ion A:
hydrogen ion

Q: Electrons flow through the electrolyte from the ________ to __________ electrode. Choices: - neutral; negative - negative; neutral - positive; negative - negative; positive A:
negative; positive

Q: Q: What does the esophagus produce for lubrication? Choices: - synovial fluid - phloem - bile - mucous A:
A: mucous

Question: Q: What is the smallest particle of an element that still has the properties of that element is called? Choices: - nucleus - neutron - proton - atom A:
Answer: atom

*Question*
Q: What type of pollutants enter the air directly? Choices: - secondary - liquid - carbon - primary A:
**Answer**
primary

*Question*
Q: What is the basic chemical building block of matter; it is the simplest chemical substance? Choices: - atoms - helium - hydrogen - element A:
**Answer**
element