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Pre-AP Chemistry : Matter

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Section 1

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density

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Chemistry Science

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Mar 1, 2020

Cards (41)

Section 1

(41 cards)

density

Front

the amount of mass in a given volume

Back

solids

Front

atoms are tightly packed and vibrate in place

Back

alloys

Front

homogeneous mixture

Back

percent error formula

Front

percent error = (accepted - experimental / accepted) x 100

Back

Nucleus of an Atom

Front

is very dense, it is positively charged, it contains all of the protons and neutrons, and it is not involved in ordinary chemical reactions

Back

Aufbau Process

Front

Electrons in an atom occupy the lowest energy orbitals available

Back

extensive property

Front

a property that depends on the system's size or amount of material

Back

solutions

Front

homogeneous mixture

Back

compounds

Front

made of different elements chemically bonded together

Back

reactants

Front

starting substances

Back

Carbon 12

Front

is the standard unit for atomic mass units aka Daltons

Back

Hund's Rule

Front

each orbital within a given sublevel gets one electron and then and only then can they have seconds.

Back

physical change

Front

doesn't change the chemical formula

Back

matter

Front

anything with mass and volume

Back

law of conservation of mass

Front

matter cannot be created nor destroyed

Back

physical properties

Front

characteristics that can be absorbed or measured without changing the chemical formula of the substance

Back

Noble Gases

Front

Generally have complete electron shells; therefore, they are known for their limited chemical reactivity

Back

liquids

Front

loosely packed and slide against each other

Back

chemical change

Front

the chemical formula changes and a new substance is formed

Back

signs of a chemical change

Front

1) burning 2) precipitate forms 3) rusting 4) releasing gas

Back

gases

Front

move freely until they collide

Back

mixture

Front

not made of pure substances; compositions vary

Back

all phase changes

Front

physical change

Back

percipitate

Front

formation of a solid from a liquid

Back

pure substances

Front

can be represented by a formula

Back

products

Front

ending substances

Back

do not have a formula

Front

mixtures

Back

heterogeneous mixtures

Front

1) different parts are able to be seen 2) liquids are unstable and will settle

Back

mass

Front

the amount of matter in a object

Back

electron affinity

Front

the energy change associated with the addition of an electron to a gaseous atom

Back

volume

Front

the amount of space an object takes up

Back

homogeneous mixture

Front

1) different parts are unable to be seen 2) liquids are stable and will not settle

Back

examples of intensive properties

Front

density, color

Back

electronegativity

Front

the ability of an atom to attract electrons when the atom is in a compound

Back

Pauli Exclusion Principle

Front

An atomic orbital may describe at most two electrons, each with opposite spin direction

Back

viscosity

Front

a fluid's resistance to flow

Back

elements

Front

pure substances that cannot be broken down and are composed of 1 type of atom

Back

chemical properties

Front

a chemical property is the ability of something to react/change info a different substance

Back

examples of extensive properties

Front

mass, volume

Back

Heisenberg Uncertainty Principle

Front

it is impossible to know exactly both the velocity and the position of a particle at the same time

Back

intensive property

Front

a property that does not depend of the system's size or amount of material

Back