periodic table
how many protons does an oxygen atom have if it has 2 shells - 6 electrons on the outer shell and 2 electrons on the inner shell?
It has 8 protons
what is the freezing point?
A temperature that makes a liquid turn into a solid.
what are intensive properties?
Changes in matter where the amount of substance that's present does not affect the change observed.
how does the stage of solid occur?
A solid forms from liquid or gas because the energy of atoms decreases when the atoms take up a relatively ordered
Who was the person that stated that compounds can be made when elements bond together?
Dalton
On the periodic table does electronegativity increase or decrease going across?
It increases
what is ionization?
it is the amount of energy needed to remove an electron from an atom's electron energy shells.
what are extensive properties?
Changes in a matter are observed depending on the amount of samples.
Examples: mass, volume, size, weight, and length
how does the stage of liquids occur?
The atoms in a liquid have more energy than the atoms in a solid. There is a special temperature for every substance called the melting point. When a solid reaches the temperature of its melting point, it can become a liquid.
Who was the person that called the atomic model plum pudding
J.J Thompson
If ionization is low is the attraction force weak or strong?
what is atomic radius?
It is the radius of an atom. The distance between an atom's nucleus and the outer electron shell.
When the number of collisions is decreasing within a system it is most likely that...
The pressure of the gas has been decreased.
how does the stage of gas occur?
Gas is a state of matter that has no fixed shape and no fixed volume. Gas particles spread out and are evenly spaced throughout a container.
What is the quantum model
the electron energy stays the same when heat is added. No increase of energy is added to the electron
Going down the groups on the periodic table what happens to atomic energy?
The atomic energy is large
what are electrons and protons?
Electrons: are a type of subatomic particle with a negative charge.
Protons: are a type of subatomic particle with a positive charge.
When the temperature os a system is increasing the volume will increase when...
When the pressure is constant.
What is classical model
when heat (energy) is added the electron follows a pattern creating a larger orbid.
what is the excited stage?
when an electron has more energy than usual. If the electron is given extra energy it becomes excited such as if it absorbs a photon, a packet of light, or if it runs into an atom or particle it would give it more energy.