periodic table
what is the second element in the periodic table
helium
what is the state of matter that takes shape of its container and has a set volume
liquid
what do periods in the periodic table tell us
how much shells an element has
(ex. period 4 = 4 shells)
what is the acronym used to memorize the 4 scientists
da te run bs
how much shells does potassium have?
how do you find the amount of neutrons in an element
atomic mass minus atomic number
what is the term for liquid to gas called
vaporisation
name a group in the periodic table that has a name
possible answers: alkali earth metals, alkali metals, halogens, noble gases
which scientist is known for discovering energy shells
bohr
how much electrons can fit on the third shell?
8
recite the first 10 elements in the periodic table
Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, and Neon
what is the term for solid to gas called?
sublimation
potassium
what did the cathode ray tube discover?
it helped thomson discover electrons
how much electrons can fit on the sixth shell?
32
whats the elemental symbol for tungsten
W
what is the term for gas to solid called
deposition
why was groups created in the periodic table
because of the similarities of the elements in the group
which scientist improved bohr's model?
Schrödinger
why don't electrons fall into the nucleus
they exist in energy levels
what element has an unknown mass
ununseptium
what is the fourth state of matter?
plasma
name the group with a stable gas and an element from that group
group: noble gases
helium, neon, argon, krypton, xenon, radon, organesson
when did Thomson discover the electron
1897
what is the lowest energy level called
ground state