chemical species Flashcards

1
Q

what is an element?

A

an element is a substance that cannot be broken down into simpler substances and where all the atoms have the same number of protons

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2
Q

what is a compound?

A

two or more different atoms or ions strongly bonded together

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3
Q

what are the 4 type of chemical species?

A
  • atoms
  • ions
  • molecules
  • molecular ions
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4
Q

what is a chemical species?

A

any single, atom, molecule, ion or molecular ion

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5
Q

what is a simple molecule?

A

a few non-metal atoms joined by covalent bonds

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6
Q

what is molecular formula?

A

the number of atoms of each element within a simple molecule

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7
Q

what are compounds?

A

two or more elements chemically bonded together

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8
Q

what are ions?

A

species with a positive or negative charge

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9
Q

what are molecular ions?

A

charged species that contain two or more non-metal elements

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10
Q

what do roman numerals indicate?

A

the positive charge of a named metal ion

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11
Q

what are anions and cations?

A

negative and positive ions

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