Unit 3 Atomic Theory study guide

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27 Terms

1
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Avg atomic mass formula

relative abundance 1 X mass 1 + answer + other answers= avg atomic mass

2
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how to find the most abundant isotope?

isotope whose mass is closest to avg

3
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opposite charged particles ____.

attract

4
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same charged particles ________.

repel

5
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the closer the distance _____. ( between two oppositely charged particles)

the more they attract and the attraction force increases.

6
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the closer the shell to the nucleus ( what happens to the attraction force?)

attraction force increases

7
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the farther the shell to the nucleus ( what happens to the attraction force?)

attraction force decreases

8
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high wavelength=

low energy (800 nm)

9
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high wavelength ( what color?) note: all wavelengths have the same speed

red

10
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low wavelength =

high energy (380 nm)

11
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low wavelength ( what color?) note: all wavelengths have the same speed

purple

12
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energy constant formula:

E = HC/ Wavelength

or

E= HF (f= frequency)

13
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coulomb’s law

E = K (+q)(-q) / R²

14
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coulomb’s law: What is the K constant?

K= 8.99×109

15
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coulomb’s law: What is the (+q)?

positive nucleus charge

16
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coulomb’s law: What is the (-q)?

negative electron charge

17
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coulomb’s law: What is the R?

Distance between charges

18
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Energy levels increase ( UP DOWN LEFT RIGHT The preodic table?)

down the periodic table

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Charge increase ( UP DOWN LEFT RIGHT?)

right ( increases as moves right on periodic table)

20
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Atomic radius increase ( UP DOWN LEFT RIGHT?)

down

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Atomic radius decrease ( UP DOWN LEFT RIGHT?)

right

22
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The closer the electron to the nucleus _____.

more ionization energy

23
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faster ejection= ________

more kinetic energy

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E photon =

Ionization energy + kinetic energy

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ionization energy=

energy- KE

26
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If the electron moves to a higher shell (n= 1 to n=5) What happens to the energy?

it absorbs energy

27
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If the electron moves to a lower shell (n= 5 to n=1) What happens to the energy?

It releases energy