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Chemistry Tutor > Week 1 > Flashcards

Week 1 Flashcards

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1
Q

Matter

A

Anything that occupies space and has a mass

All matter is made up of particles

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2
Q

The particle theory of matter explains that

A

The particles in each different state (solid, liquid, gas) behave differently

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3
Q

Solids

A

Particles packed together in a fixed 3D lattice
Attractions between particles very strong (higher melting point)
Particles vibrate but don’t move out of fixed positions

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4
Q

The higher the melting point…

A

The stronger the bonds between the particles

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5
Q

Liquids

A

Particles are disordered and collide into each other and walls of the container.
Volume remains constant

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6
Q

Gases

A

Particles far apart and disordered
Particles collide into each other and the walls of the container
Volume isn’t constant

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7
Q

Mass

A

Measure of the quantity of matter in an object regardless of gravity force

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8
Q

Weight

A

The force that gravity exerts on an object

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9
Q

Substance

A

A form of matter that has a constant composition and distinct properties
Can write a chemical formula

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10
Q

Mixture

A

A combination of two or more substances.
Do not have a constant composition.
Cannot write a chemical formula

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11
Q

Atoms

A

All matter is composed of atoms

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12
Q

Element

A

A substance composed of only one type of atom

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13
Q

Compound

A

A substance composed of two or more different types of atoms

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14
Q

Protons and neutrons…

A

Have roughly the same mass (1)

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15
Q

Subatomic particles

A

Protons, neutrons and electrons

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16
Q

Atomic number

A

Number of protons in the nucleus of each atom of an element

Determines the chemical identity of an atom

17
Q

Isotopes

A

Atoms that have the same atomic number but different mass numbers
Isotopes of the same element have similar characteristics because neutrons do not take part in chemical reactions

18
Q

Chemical properties of an element

A

Protons and electrons determine the chemical properties of an element
Neutrons do not take part in CHEMICAL reactions

19
Q

Masses of subatomic particles

A

E-1/1836
P-1
N-1

20
Q

Similarities of isotopes

A

Atomic number
Chemical properties
Number of electrons

21
Q

Differences of isotopes

A

Mass number
Number of neutrons
Stability of nucleus

Chemistry Tutor (19 decks)

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