Investigation 1 Chem 1

Front

For an electron in an atom to change from the ground state to an excited state,

Back

energy must be absorbed

Front

According to Dalton's atomic theory, atoms

Back

of each element are identical in size, mass, & other properties

Front

The first scientist to show that atoms emit tiny negative particles was

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Thomson

Front

The energy level of a photon of light is directly related to its: speed, size, frequency, mass

Back

frequency

Front

Ethane (C₂H₆) has

Back

six atoms of hydrogen & two atoms of carbon

Front

As the atomic number increases, the number of electrons in a neutral atom

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increases

Front

How many protons, electrons, and neutrons, respectively, does ¹⁶O have?

Back

8, 8, 8

Front

A nuclear particle that has about the same mass as a proton, but with no electrical charge, is called a(n)

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neutron

Front

Bohr's theory helped explain why

Back

excited hydrogen gas gives off certain colors of light

Front

In Rutherford's experiments, alpha particles were used to...

Back

bombard thin metal foil