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science > Chemistry Review > Flashcards

Chemistry Review Flashcards

chem key terms

1
Q

Valence electrons

A

electrons in the outermost shell of an atom

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2
Q

Cations

A

ions when metals lose electrons

positive charge

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3
Q

Anions

A

non-metals when they gain electrons

negative charge

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4
Q

Ionic compounds

A

ionic bonding between metals and nonmetals

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5
Q

molecular compounds

A

nonmetals forming a covalent bond (sharing electrons)

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6
Q

covalent bond

A

sharing electrons

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7
Q

ionic bond

A

transfered electrons

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8
Q

Synthesis reaction

A

A + B -> AB

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9
Q

Decomposition reaction

A

AB -> A + B

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10
Q

Single displacement

A

A + BC -> AC + B

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11
Q

Double displacement

A

AB + CD -> AD + CB

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12
Q

Acid

A

molecular compounds that produce H+ in solutions

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13
Q

Anion

A

Ions that gained electrons

two nonmetals

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14
Q

Base

A

ionic compounds with low pH that produce OH-

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15
Q

Binary compound

A

a substance made of two different elements only

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16
Q

Catalyst

A

a substance that accelerates or causes a chemical reaction without getting charged

17
Q

Coefficient

A

the number in front telling how many molecules are there

18
Q

Compound

A

two or more elements chemically joined

19
Q

Covalent bond

A

sharing electrons between two atoms

20
Q

Dissociation

A

separation the ions in the compound to create a conductive substance

21
Q

Diatomic molecule

A

molecules made up of two atoms

22
Q

Ion

A

a charged atom

23
Q

Ionic bond

A

transferring electrons between atoms

metal and nonmetal

24
Q

Halogen

A

most reactive group

25
Q

Law of conservation of mass

A

mass is neither created nor destroyed

26
Q

Neutralization

A

acid + base

NaCl + H2O

27
Q

3 examples of indicators

A

red/blue litmus, phenolphthalein, methyl red

28
Q

phenolphthalein

A

colorless, turns red in bases

29
Q

red litmus paper

A

red in acids and neutral, blue in bases

30
Q

blue litmus paper

A

red in acids, blue in neutral and bases

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