Each of the following describes an "Atom 1" and an "Atom 2." In which case are the two atoms different isotopes of the same element?

A) Atom 1: nucleus with seven protons and eight neutrons, surrounded by seven electrons
Atom 2: nucleus with seven protons and seven neutrons, surrounded by seven electrons
B) Atom 1: nucleus with six protons and eight neutrons, surrounded by six electrons
Atom 2: nucleus with seven protons and eight neutrons, surrounded by seven electrons
C) Atom 1: nucleus with eight protons and eight neutrons, surrounded by eight electrons
Atom 2: nucleus with eight protons and eight neutrons, surrounded by seven electrons
D) Atom 1: nucleus with four protons and five neutrons, surrounded by four electrons
Atom 2: nucleus with five protons and five neutrons, surrounded by four electrons


A) Atom 1: nucleus with seven protons and eight neutrons, surrounded by seven electrons
Atom 2: nucleus with seven protons and seven neutrons, surrounded by seven electrons

Physics & Space Science

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Physics & Space Science

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Physics & Space Science

An ant crawls in a straight line at a constant speed of 0.24 m/s for a distance of 3.0 m, beginning in the corner of a square classroom. It then turns exactly 90 degrees to the right, and proceeds an additional 4.0 m with a constant speed of 0.44 m/s, reaching the other corner of the same wall from which it began. What was the average speed for the full trip from corner to corner?

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Physics & Space Science

Why does Earth have so little carbon dioxide in its atmosphere compared to Venus?

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Physics & Space Science