Unit 3 Atomic Theory study guide

Avg atomic mass formula

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

how to find the most abundant isotope?

isotope whose mass is closest to avg

opposite charged particles ____.

attract

same charged particles ________.

repel

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

the more they attract and the attraction force increases.

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

attraction force increases

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

attraction force decreases

high wavelength=

low energy (800 nm)

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

red

low wavelength =

high energy (380 nm)

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

purple

energy constant formula:

E = HC/ Wavelength

or

E= HF (f= frequency)

coulomb’s law

E = K (+q)(-q) / R²

coulomb’s law: What is the K constant?

K= 8.99×10⁹

coulomb’s law: What is the (+q)?

positive nucleus charge

coulomb’s law: What is the (-q)?

negative electron charge

coulomb’s law: What is the R?

Distance between charges

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

down the periodic table

Charge increase ( UP DOWN LEFT RIGHT?)

right ( increases as moves right on periodic table)

Atomic radius increase ( UP DOWN LEFT RIGHT?)

down

Atomic radius decrease ( UP DOWN LEFT RIGHT?)

right

The closer the electron to the nucleus _____.

more ionization energy

faster ejection= ________

more kinetic energy

E photon =

Ionization energy + kinetic energy

ionization energy=

energy- KE

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

it absorbs energy

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

It releases energy