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Chemistry

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Moshe Kunze

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Cards in this guide (14)
What are quarks

Quarks are any of a group of subatomic particles thought to be among the fundamental constituents of matter more specifically, of protons and neutrons.

The concept of the quark was first proposed by Murray Gell-Mann and George Zweig ; its name was taken from James Joyce's novel Finnegans Wake. Quarks include all particles that interact by means of the strong force. They have mass and spin, and they obey the Pauli exclusion principle. They have never been resolved into smaller components, and they never occur alone. Their behaviour is explained by the theory of quantum chromodynamics, which provides a means of calculating their basic properties. There are six types of quarks, called up, down, strange, charm, bottom, and top. Only the up and down quarks are needed to make protons and neutrons; the others occur in heavier, unstable particles. Subatomic particles that make up protons and neutrons

What energy is the source that panels use to make electricity

Solar panels are used to make electricity. The energy that panels use to make energy therefore is solar energy.

Which element is not found in the carboxylic acid functional group

Sulfur.

What kind of changes contribute to spontaneity

An increase in entropy.

What must happen for a nucleus to be stable

The strong nuclear force must balance electrostatic forces in the nucleus

What information is obtained from radioactive dating

The age of an object that was once living.

Which molecule has 5 carbon atoms

pentane

What does S0 mean

the system has become more random

What is the energy of a photon that emits a light of frequency 6.42 times 1014 Hz

4.25 x 10 -19 j

Which molecule is a stereoisomer of trans-2-pentene

You think probable to cis-2-pentene.

How much energy is released is a sample loses 0.05 kg mass through radioactive decay

4.5 × 1015 J

A worker at a nuclear power plant has noticed that his dosimeter alarm has been activated. What might this indicate

Answer this question…

Radiation is being released from the reactor.

What kind of nuclear reaction is seen in 146 62 Sm 142 60 Nd plus 4 2 He

Alpha decay

What is Hesses law

the enthalpy of a reaction does not depend on the path

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