Science Flashcards

1
Q

matter

A

anything that takes up space

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2
Q

Mass

A

a measure of the amount of matter in an object

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3
Q

Weight

A

measure of gravitational force on an objects

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4
Q

Volume

A

An amount of space an object takes up

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5
Q

density

A

The ratio of the mass of a substance in its volume

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6
Q

Atom

A

the smallest unit of an element

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7
Q

Element

A

a pure substance that is made from a single type of atom

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8
Q

periodic table

A

an arrangement of all known elements in order of atomic number

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9
Q

Pure substance

A

a material that cannot be physically separated into its parts

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10
Q

Molecule

A

a group of atoms

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11
Q

Chemical bonds

A

attractive force that holds atoms together

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12
Q

Compounds

A

a pure substance made up of 2 or more different types of atoms joined by chemical bonds

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13
Q

Crystal

A

Substance in which atoms are arranged in an orderly geometric repeating pattern

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14
Q

Substrict

A
  • a number below and to the right of the symbol shows how many atoms of that element there are. If no subscript, one atom of the element is present (small#)
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15
Q

Coefficient

A

a number place in front of a chemical formula to show how many molecules of the substance are represented (big #)

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16
Q

Atomic Number

A

is related to the structure of the atoms each element has a unique atomic number

17
Q

Atomic symbol –

A

every element is represented by a symbol of 1.2 or 3 letters

18
Q

Atomic Name

A

Name of element from a person, place or when discovered

19
Q

Atomic Mass

A

The mass is related to the mass of its atom