BJU Chemistry 4

Those who agreed with the continuous theory believed matter could NOT be subdivided w/o end

protons

first experimental atomic model

Two different isotopes of a single element would have the same number of __ but a different number of ___

The number of protons in an atom's nucleus is its___

The fact that any sample of water contains 8 g of oxygen for every 1 g of hydrogen illustrates ___.

Who formulated a new atomic model because of discoveries made during an alpha particle experiment?

neutrons

Tritium is an isotope of hydrogen that has a mass number of 3. Whay is its isotopic notation?

Identifying the different isotopes of an atom is important for understanding risks associated w/its physical properties

Weighted averages of isotopes of an element determines its atomic mass

Two different isotopes of a single element would have the same number of __ but a different number of ___

scientists found a connection between number of protons in nucleus of an atom & the atoms chemical & physical properties

one twelfth the mass of a carbon-12 atom is defined as an atomic mass unit

Rutherfords model showed that the nucelus of an atom is a small region in its center that is negatively charged

Neutrons contribute to an atom's mass and charge

The smallest particle capable of chemical interaction is the atom

Isotopes of an element generally have the same __ but different __

cathode rays

xrays

An electrically balanced atom must have the same number of protons as neutrons

Isotopes of an element generally have the same __ but different __

In atomic notation, Z represents the number of ___ in an atom.

gold foil experiment

Changes were made to Rutherford's atomic model to include the addition of ___

What is the isotopic notation for an atom with 33 protons, 42 neutrons, and 33 electrons?

Which of the following was a belief that matter was made of separate, discrete particles?

The number of protons in the nucleus of an atom it its atomic model

which means masses of elements can combine to form a ration that can be reduced to small, whole numbers

philosophical atomism

JJ Thompson concluded that every stom contained small, ___ particles

John Dalton proposed the first atomic model that was based on experimental evidence

Which chemists' experimentations with compunds eventually led to the formulation of the law of definite proportion?