Compounds And Molecules Flashcards

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0
Q

Molecule

A

Smallest unit of a compound

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1
Q

Atom

A

Smallest unit of an element

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2
Q

Compound

A

2 or more elements chemically combined

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3
Q

Element

A

Made up of only 1 type of atom

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4
Q

Chemical formula

A

Explains the type and number of elements in a compound

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5
Q

Covalent bond

A

A chemical bond that occurs when 2 atoms share an electron

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6
Q

Chemical bond

A

A bind that holds 2 atoms together in a compound

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7
Q

Ionic bond

A

A chemical bond that occurs when one atom gives an electron to another atom

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8
Q

Positive ion

A

When an atom loses one or more electrons

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9
Q

Valence electron

A

An electron in the outer shell of an atom

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10
Q

Ion

A

A charged atom that has gained or lost electrons

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11
Q

Negative ion

A

When an atom gains one or more electrons

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12
Q

Water

A

H2O

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13
Q

Stomach acid

A

HCl

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14
Q

Carbon Dioxide

A

CO2

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15
Q

Sugar

A

C6H12O6

16
Q

Table salt

A

NaCl

17
Q

Sand

A

SiO2

18
Q

Rust

A

Fe2O3

19
Q

Limestone

A

CaCO3

20
Q

An ion is an atom that has gained or lost electrons.

A

True

21
Q

If an atom gains an electron, then it has a positive charge.

A

False

22
Q

If Sodium loses one electron, then it’s ion charge is Na-.

A

False

23
Q

If Chlorine gains one electron it’s ion charge is Cl-2.

A

False