Electrons
what is the fundamental particle that cannot be subdivided into smaller entities
Electron
Ionization
the removal of electrons from an atom
When Eratosthenes measured the size of the Earth, he used the well at Syene and a stake at Alexandria to measure the angle "A" (look at a diagram). What measurement was also needed?
The distance from Syene to Alexandria
Mass of the sun
1.9891 x 10^33
How many electrons can the first atomic shell have?
2
Isotopes
atoms of the same element that have the same # of protons but diff # of neutrons
If the distance from Syene to Alexandria was 800 km and the angle was 7.2 degrees what is the actual radius of the Earth?
6370.5 km
If the sun subtends an angle of about 0.5 degrees, and we know that is it about 93,000,000 miles away, what is the approximate physical size of the sun?
811,000 miles
How many electrons can the second atomic shell contain?
8
How many atomic bonds does oxygen like to form?
Oxygen (group 16) has 6 valance electrons, needs 2 more to complete outer shell (they need 8)
2
Solids, liquids and gas all depend on:
Temperature and Pressure
What is 1.5 x 10 ^3 in between?
1000 and 10,000
How many electrons can the not-so-typical carbon atom 14/6c contain?
14 =atomic mass (protons+ neutrons)
6 = atomic number (protons)
This atom has less than or equal to 6 electrons
How many atomic bonds does Xenon (Xe) like to form?
Xenon (group 18) has a full shell of 8 valance electrons
0
Who held the view that the earth was flat with a dome view with the planets and stars?
Babylonians
What is 1.5 x 10^-3
0 and 1
Electron mass:
9.109 x 10^-28 gm
Iron-56 composed of 26 has how many neutrons, proton
26 protons
30 Neutrons
Greek philosopher who claims the firmament is a circle with a disk in the middle, things far away from earth are "on a celestial sphere"
flaw: could fall off the edge
Anaximander
What does larry's red shirt say about music
you hear the music, but you feel the bass