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Solve the inequality. ( x + 4 ) ( x 4 ) ( x 9 ) 0
Inorganic Compound
A simple substance that does not contain a carbon backbone.
Carbon
Carbon is a chemical element with symbol C and atomic number 6, essential to life on Earth, forming a vast number of compounds including fossil fuels and DNA.
Valence Electrons
The electrons in the outer electron shell, known as the valence shell, of an atom; in the formation of a chemical bond, an atom can accept electrons into its valence shell or donate or share valence electrons.
Isotopes
Variants of a particular chemical element that differ in neutron number, and consequently in mass, but not in chemical properties.
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