Two or more forms of the same element that have different bonding structures in the same physical phase are called
a. isobars.
b. allotropes.
c. isotopes.
d. isomers.
b
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Describe those surface features that indicate water once flowed on Mars
What will be an ideal response?
Which of the following is not a SI base unit?
A. kelvin B. kilogram C. newton D. second E. meter
Determining answers to questions to determine your audience's wants and expectations is part of conducting a(n) ______.
A. needs assessment B. target audience profile C. ROI D. CTA
Scientists are confident that the Moon does not have a large, dense nickel-iron core because
A) the Moon's surface rocks are similar in density to the Moon's average density. B) deep samples taken by the Apollo astronauts found almost no iron. C) the Earth's magnetic field would pull anything with a lot of iron into the Earth. D) unmanned Soviet missions drilled into the Moon's core and did not find iron. E) a thick atmosphere is required for there to be a metal core.