Chemistry Quiz Notes by Talha

Periodic table:

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an organized arrangement of elements that explains

and predicts physical and chemical properties.

-Tooba

Atomic mass:

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the average mass of an atom of an element.

-Tooba

Atomic Number:

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average mass of an atom of an element.

Azfaar

Atom:

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a particle is an element ; from the

Greek word atomas,

meaning '' invisible''

Azfaar

Mendeleev's Periodic Law states:

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if the elements are arranged according to their

atomic mass, a pattern can be seen in which similar

properties occur regularly.

-Tooba

Atomic Model

amaiz100 — 2014-10-03 13:48:51 UTC

A theory proposed by John Dalton

in 1808 to explain why elements differ from each

other and from non-elements.

-Talha

Combustion:

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the chemical reaction that occurs

when a substance reacts rapidly

with oxygen and releases energy.

Azfaar

Modern Periodic Law states:

2014-10-03 13:54:57 UTC

If the elements are arranged according to their

atomic number, a pattern can be seen in which similar

properties occur regularly.

-Tooba

Protons

amaiz100 — 2014-10-03 13:55:05 UTC

are positively charged particles with a relative mass of 1,

located in the nucleus.

-Talha

Pure Substance

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a substance that contains only

one kind of particle.

Azfaar

Physical Properties

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Characteristics or description of a substance

that would help identify.

Atomic Radius:

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the average distance from the nucleus to their outer

edge of a spherical atom.

-Tooba

Physical Change:

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a change in the state or form of a

substance that does not change

the original substance.

Azfaar

Chemical Group

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the set of elements that appears in the same

column in the periodic table.

-Tooba

Alkali Metals:

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elements that occupy the far left column (first

group of the periodic table).

-Tooba

Neutrons

amaiz100 — 2014-10-03 13:59:31 UTC

are neutral particles with a relative mass of 1,

also located in the nucleus.

-Talha

Malleability, Ali

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When a metal can be hammered or bent into different shapes.

Mixture:

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a substance that contain two different

pure substance or types of particles.

Electrons

amaiz100 — 2014-10-03 14:03:46 UTC

Negatively charged particles with a

relative mass of approximately 1/2000

of the mass of a proton or neutron, travelling in regions

of space around the nucleus. -Talha

Ductility, Ali

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When a solid can be pulled into wires or strings.

Melting and Boiling Points, Ali

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The temperature of when a solid, liquid or gas changes its state.

Crystal Form, Ali

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Crystals are solid forms of many minerals in a structure of cubes and other patterns.

Molecule:

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the combination of two or more atoms.

Azfaar

Noble Gasses:

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inert gasses, found on the far right column of

the periodic table, that almost never form chemical

compounds with other elements.

-Tooba

Solubility, Ali

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Thye ability of a substance to dissolve in solvent.

Isotop

amaiz100 — 2014-10-03 14:14:59 UTC

is any of two or more forms of an element,

each having the same number of protons

but having a different mass due to a different

number of neutrons.

-Talha

Chemical Symbol

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an abbreviation for the name of an

element.

Azfaar

Viscosity, Ali

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The measure of how fast a liquid can flow.

Halogens:

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reactive nonmetals that occur in different states

and occupy the seventeenth column of the periodic table.

-Tooba

Density, Ali

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Density is the amount of matter per unit volume.

Structural Diagram:

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a drawing to explain molecules in

which atoms are represented by

chemical symbol and bonds are shown as

straight lines connecting the symbols.

Azfaar

Chemical Properties, Ali

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The behaviour of a substance when it becomes a new substance.

Decay

amaiz100 — 2014-10-03 14:20:45 UTC

splitting apart of unstable nuclei to produce

radioactive particles.

-Talha

Combustability

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When a chemical has the ability to react with to react to oxygen

Bonds

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a concept used in models that

represent the force that hold the

atom together

Azfaar

Subatomic Particles

amaiz100 — 2014-10-03 14:28:18 UTC

the protons,neutrons, and electrons that make up

atoms.

-Talha

Combining Capacity

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the ability of an element to combine

with other elements.

Azfaar

Metal:

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a solid that is generally shiny and malleable and a

good conducter of heat and electricicty

Standard Atomic Notation

amaiz100 — 2014-10-03 14:31:28 UTC

an internationally recognized system used to

identify chemical substances.

-Talha

Precipitate:

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a solid , insoluble materials that

forms in a liquid solution.

Azfaar

Metalloids:

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elements that posses both metallic and nonmetallic

properties

-Tooba

Periods:

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a horizontal row of elements on the periodic table.

-Tooba

Orbit

amaiz100 — 2014-10-03 14:38:30 UTC

a circular path around the nucleus associated with

different electrons.

-Talha

Metal

2014-10-03 14:38:35 UTC

a solid that is generally shiny and malleable and a good

conductor of heat and electricity.

-Tooba

Reaction With Acid

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When a solid has a reaction with acid.

Polymers:

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a material made of long