letra de black till - fateh & girik aman
structure of the atom
matter has m-ss and takes up sp-ce.
atoms are basic building blocks of matter, and cannot be chemically subdivided by ordinary means.
the word atom is derived from the greek word atom which means indivisible.
the greeks concluded that matter could be broken down into particles to small to be seen.
these particles were called atoms
atoms are composed of three type of particles: protons, neutrons, and electron.
protons and neutrons are responsible for most of the atomic m-ss e.
g in a 150 person 149 lbs, 15 oz are protons and neutrons while only 1 oz.
is electrons.
the m-ss of an electron is very small (9.
108 x 10-28 grams).
both the protons and neutrons reside in the nucleus.
protons have a postive (+) charge, neutrons have no charge –they are neutral.
electrons reside in orbitals around the nucleus.
they have a negative charge (-).
it is the number of protons that determines the atomic number, e.
g., h = 1.
the number of protons in an element is constant (e.
g., h=1, ur=92) but neutron number may vary, so m-ss number (protons + neutrons) may vary.
the same element may contain varying numbers of neutrons; these forms of an element are called isotopes.
the chemical properties of isotopes are the same, although the physical properties of some isotopes may be different.
some isotopes are radioactive-meaning they “radiate” energy as they decay to a more stable form, perhaps another element half-life: time required for half of the atoms of an element to decay into stable form.
another example is oxygen, with atomic number of 8 can have 8, 9, or 10 neutrons.
letras aleatórias
- t hayes › letra de twilight cogitation v - t. hayes
- clearside › letra de problem - clearside
- the flamin groovies › letra de day tripper - the flamin' groovies
- blood on the dance floor › letra de where's my wonderland (unplugged) - blood on the dance floor
- ghost machine › letra de god forbid (quiet room mix) - ghost machine
- tay k › letra de based (dp beats version) - tay-k
- icebergofficial › letra de sam i am - icebergofficial
- souleymane diamanka › letra de chagrin des anges - souleymane diamanka
- saske › letra de h2o - saske
- khontkar › letra de kime ne - khontkar