periodic table understanding
what is a period in the periodic table
a row
name a stable isotope with two neutrons.
helium.
what element has atomic number 1
hydrogen
Is hydrogen - 100000 stable
no
what is a group in the periodic table
a column
to the neaest 50, how old is the periodic table?
156
what element do we breathe
oxygen
what element is used for nuclear bombs
Uranium or plutonium
how many protons does tungsten have
what decade was plutonium descovered
1940's
how many elements are there (to the nearest 5)
118
is helium - 4 stable
yes
how many neutrons does carbon - 12 have
6
who invented the periodic table
Dmitri Mendeleev
what element is plastic primerally made from
carbon
is carbon - 13 stable
yes
what is the maximum number of electrons can hydrogen have?
2
what is the newest element to be descovered?
oganesson
what is the metal with the highest melting point?
tungsten
name all the types of radioactive decay, and the particles they release.
Alpha decay:
helium-4 nucleas
Beta +:
positron, neutron, nutrino
Beta -:
electron, proton, anti-nutrino
Gamma decay:
Photon