Flashcards in Lecture One: Introduction Deck (108)
How much of the world is water
what are the 3 phases of water?
liquid, vapour, and solid
what compound is in 3 phases?
water is the only one naturally able to reside in 3 phases.
How did water come to earth , theory?
ice is on astroids, physicists think the earth was bombarded with astroids and mediators , this then melted on impact and created water on earth
what does an atom consist of?
nucleus, electron shell (cloud)
what is in the nucleus?
contains: protons (positive charge)
neutrons (no charge)
what does the electron shell contain?
Electron shell has electrons (negative charge)
electrons have what charge?
protons have what charge?
Do neutrons have a charge?
what is H?
what is O and C?
Oxygen and Carbon
whats an ion?
an atom or molecule that has a net electric charge, which has been made due to the gain or loss of an electron
can you gain and loose protons?
which electrons are gained and lost?
ones in the outer most cell
whats Na+ ?
whats Cl- ?
why does sodium have a positive charge?
whats explosive when exposed to water?
chlorine gas can do what to you?
sodium and chlorine make?
what is S ?
what is P?
what happened in 1953?
basic form of DNA was being discovered
what happens in 2003?
mapping the human genome
whats the atomic number?
number of protons in the nucleus of an atom
Are noble gases reactive?
why are atoms allowed to ionise?
because of the atoms in the outer shell