Molecular Movement
Does kinetic energy increase or decrease when you freeze water?
Decrease!
Which subatomic particle does not give an atom significant mass?
The electrons!
To jump away from the nucleus, atoms must absorb or release energy?
Absorb!
Which element does the following electron configuration represent?
1s2 2s2 2p4
Oxygen
Which element has a greater attractive force on its electrons? Why?
Ba or Mg
Mg! Less distance!
does kinetic energy increase or decrease as you go from a gas to a solid?
KE decreases!
How many protons in Calcium-41?
20 protons!
Are electrons more stable when far away or close to the nucleus?
Write the electron configuration for Aluminum
1s2 2s2 2p6 3d2 3p1
Which element has a bigger atomic radius? Why?
Silicon or Carbon?
Silicon! More distance!
What is different about liquid water and steam on the molecular level?
in steam, molecules are farther apart and have more kinetic energy!
Which isotope of carbon is more abundant?
Isotope A: 12 amu
Isotope B: 13 amu
Isotope A!
Which has a longer wavelength, purple or orange light?
Orange light!
Draw the Bohr diagram for Nitrogen
See board
Which element has smaller atomic radius? Why?
Cu or Zn?
Zn! More protons!
How is heat transferred between molecules (on the molecular level)? Does heat transfer from hot to cold or cold to hot?
Through molecular collisions! Always hot to cold!
How many protons and neutrons are in Silver-107
47 protons! 60 neutrons!
Which electron jump will produce light with more energy?
n=5 --> n=2 OR n=2 --> n=1
n=5 --> n=2
Draw the Bohr diagram for Calcium
See board
Which element has a greater electronegativity? Why?
Helium of Xenon?
Helium! Less distance!
How does Temperature affect the pressure inside a container? Why does this happen (think collisions!)
Increases the number of collisions, which increases pressure!
What element could this be?
Isotope A: 79 amu, 76% abundance
Isotope B: 76 amu, 24% abundance
78.93 amu! Selenium (Se)!
Which electron jump will produce light with a shorter wavelength?
n=4 --> n=1 OR n=2 --> n=1
n=4 --> n=1
Correct this electron configuration:
1s2 2s2 2p6 3s1 4p6
1s2 2s2 2p6 3s2 3p5
Which element has a greater electronegativity? Why?
Calcium or Bromine?
Bromine! More protons!