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Section 1

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quantum ( 5.1 )

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Chemistry Science

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Mar 1, 2020

Cards (39)

Section 1

(39 cards)

quantum ( 5.1 )

Front

Energy is the amount of energy required to move an electron from one energy level to another.

Back

Proton (4.2)

Front

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

Back

Atom ( 4.1 )

Front

the smallest particle of an element that retains its identity in a chemical reaction

Back

Pauli Exclusion Principle ( 5.2 )

Front

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

Back

Daltons atomic theory- 1 ( 4.1 )

Front

All elements are composed of tiny indivisiable particles

Back

quantum mechanical model ( 5.1 )

Front

the modern description of the electrons in atoms came from the mathematical solutions to the Schrodinger equation

Back

Sir William Crookes

Front

1870- first to suggest isotopes; invented the Cathode ray tube.

Back

Energy Levels ( 5.1 )

Front

The fixed energies an electron can have. Each possible electron orbit in Bohr's model

Back

Frequency ( 5.3 )

Front

The number of waves cycles to pass a given point per unit of time.

Back

Wave Length ( 5.3 )

Front

The distance between the crest

Back

Periodic Law ( 6.1 )

Front

when the elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties.

Back

9.11 X 10^-19

Front

Mass of the electron ( Robert Millikan )

Back

Metals ( 6.1 )

Front

Yellow squares. make up 80%. Good contuctors of heat and electric currents.

Back

Law of Consant Composition

Front

Made by Joseph Proust ( 1799 ) - Each pure chemical compound always has the same % composition of each element by mass.

Back

electromagnetic radiation ( 5.3 )

Front

a kind of radiation including visible light, radio waves, gamma rays, and X-rays, in which electric and magnetic fields vary simultaneously.

Back

Nucleus ( 4.2 )

Front

Center of an atom

Back

Isotopes ( 4.3 )

Front

Atoms that have the same number of protons but diff. number of Neutrons.

Back

Electron ( 4.2 )

Front

A subatomic particle that has a negative charge founded by J.J Thomson

Back

electron configuration ( 5.2 )

Front

the arrangement of electrons in an atom

Back

Aufbau Principle ( 5.2 )

Front

An electron occupies the lowest-energy orbital that can receive it

Back

subatomic particles (4.2)

Front

Atoms are divisable

Back

atomic orbital ( 5.1 )

Front

a region of space in which there is a high probability of finding an electron

Back

atomic number (4.3)

Front

The number of Protons in the nucleus of an atom of that element. This identifies the element

Back

Dalton's Atomic Theory- 2 ( 4.1 )

Front

Atoms of the same element are identical

Back

Dalton's Atomic Theory- 3 ( 4.1 )

Front

Atoms of diff. elements can physically mix together or chemically combine in ratios to form a compound

Back

Date 1869

Front

A russian Chemist and teacher Dmitri Mendeleev published a table of elements. Arranged them in increasing atomic mass.

Back

Metalloids ( 6.1 )

Front

Has properties that are similar to those of metals and nonmetals.

Back

Hund's Rule ( 5.2 )

Front

electrons occupy orbitals of the same energy in a way that makes the number of electrons with the same spin direction as large as possible

Back

Micheal Faraday (1791-1867)

Front

1834- showed that electrical current could cause chemical reactions to occur.

Back

Law of Conservation of Matter

Front

Made by Antonine Lavoisier ( 1774 ) - In a chemical reaction matter can't be made or destroyed.

Back

Dalton's Atomic Theory- 4 ( 4.1 )

Front

Chemical reactions occure when atoms rearrange

Back

Neutron (4.2)

Front

A subatomic particle that has no charge and that is found in the nucleus of an atom

Back

Dates 1765- 1775 ( 6.1 )

Front

Chemists made/identified new elements.

Back

Amplitude ( 5.3 )

Front

The wave's height from zero to crest

Back

mass number ( 4.3 )

Front

the total number of protons and neutrons in the nucleus of an atom

Back

Date 1829

Front

A german chemist J.W Dobereiner published a classification of the elements.

Back

Law of Multiple Proportions

Front

if two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers- John Dalton

Back

Nonmetals ( 6.1 )

Front

poor conductors of heat and electric current. Carbon is an exception.

Back

J.J. Thomson (1897)

Front

discovered the electron; Determined their charge to mass ratio (e/m= -1.76x10^6 coulombs grams^-1)

Back