Chapter 2 Flashcards

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1
Q

Anything that takes up space or mass

A

Matter

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2
Q

Substance that can’t be broken down to other substances by chemical reaction

A

Element

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3
Q

Consists of 2 or more different elements

A

Compound

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4
Q

What 4 elements make up 96% of all living matter?

A

C,H,N,O

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5
Q

What organisms need to live a healthy life

A

Essential element

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6
Q

Required for organisms in minuscule amounts

A

Trace element

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7
Q

Number of protons in the nucleus

A

Atomic number

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8
Q

Total mass of element

A

Atomic mass

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9
Q

An element that has the same number of protons but a different number of neutrons

A

Isotope

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10
Q

Energy level of electrons at a characteristic average from the nucleus

A

Electron shell

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11
Q

Capacity to cause change

A

Energy

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12
Q

What is the only subatomic particle that is involved in chemical reactions?

A

Electrons

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13
Q

Energy that matter possesses because of location or structure

A

Potential energy

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14
Q

What determines the chemical behavior of an atom?

A

Distribution of electrons in the atom’s electron shell

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15
Q

2 or more molecules held together by covalent bonds

A

Molecule

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16
Q

Attraction of a particular atom for electrons of a covalent bond

A

Electronegativity

17
Q

An uneven distribution of charges between 2 atoms

A

Polar

18
Q

Electrons are equally shared between 2 atoms

A

Nonpolar

19
Q

Negative charged ion

A

Anion

20
Q

Positive charged ion

A

Cation

21
Q

Weak attractions between molecules or parts of molecules that result from local partial changes

A

Van der Waals

22
Q

List the bonds from strongest to weakest

A

Covalent, ionic, hydrogen, van der waals

23
Q

Reactions are still going on but their concentrations have stabilized at a particular ratio

A

Dynamic equilibrium

24
Q

Particles smaller than an atom

A

Subatomic particle