Answer the following question given this paragraph: The smallest particle of an element that still has the element's properties is an atom . All the atoms of an element are alike, and they are different from the atoms of all other elements. For example, atoms of gold are the same whether they are found in a gold nugget or a gold ring (see Figure below ). All gold atoms have the same structure and properties. Q: What is the smallest particle of an element that still has the element's properties? A:
OPTIONS:
- an ion
- a nucleus
- an electron
- an atom
an atom
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Answer the following question given this paragraph: All crocodilians have, like humans, teeth set in bony sockets. But unlike mammals, they replace their teeth throughout life. Crocodiles and gharials (large crocodilians with longer jaws) have salivary glands on their tongue, which are used to remove salt from their bodies. This helps with life in a saltwater environment. Crocodilians are often seen lying with their mouths open, a behavior called gaping . One of its functions is probably to cool them down. Q: Lying with their mouths open, a behavior called gaping, probably serves what function for crocodiles? A:
OPTIONS:
- sleeping
- digesting
- eating
- cooling down
cooling down
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Answer the following question given this paragraph: Image copyright SergiyN, 2014. Coil of copper wire, which conducts electricity well due to metallic bonds . Used under license from Shutterstock. com. Q: What gives a coil of copper wire the ability to conduct electricity well? A:
OPTIONS:
- optical bonds
- metallic electrons
- metallic ions
- metallic bonds
metallic bonds
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Answer the following question given this paragraph: Q: Where does an electron move to after it absorbs energy? A:
OPTIONS:
- another electron
- atomic orbit
- a shell closer to the nucleus
- a shell farther from the nucleus
a shell farther from the nucleus
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