Periodic Trends & Atomic Theory Review

What scientist proposed this atomic model?

• Dalton

• Thomson

• Rutherford

• Bohr

What evidence led Niels Bohr to believe that electrons occupy specific energy levels in atoms?

• Excited electrons emit colored light at every possible wavelength.

• Excited electrons emit colored light at only certain wavelengths.

• Electrons emit colored light only when in an excited state.

• Electrons emit colored light only when in ground state.

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Which has the greater EN: 

Cl or Na?

• Cl

• Na

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Which has the greater EN: 

Br or F?

• Br

• F

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Which of the following will have a larger atomic radius than Oxygen?

• Lithium

• Fluorine

• Neon

• Helium

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Which atom has the largest atomic radius?

• potassium

• rubidium 

• francium

• cesium

As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.

• The atoms have more protons.

• The atoms have more energy levels

• The atoms have more nuetrons

As you move across the periodic table atoms tend to get smaller because, ______________.

• the atoms have more mass.

• the atoms have less mass

• the atoms have more protons.

• the atoms have less electrons.

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Electronegativity is...

• how good an atom is at attracting electrons

• the ability of an atom to lose electrons

• the energy required to remove an electron from a specific atom

• how easy it is to make friends. 

Ionization energy is...

• the energy required to add an electron to a specific atom

• how much energy it takes to remove an electron from an atom

• the energy required to shield the outer electrons from the nucleus

• a measure of the ability of an atom to attract electrons