topic 1 lesson 2 Flashcards
what r three subatomic particles
electrons, protons, neutrons
what atom moves around the nucleus
Electrons
which subatomic particles are nutrual
Neutrons
which subatomic particles are negative.
Electrons
which 2 particles have the same weight
prtons and neutrons
what is the weight of a neutron
1/1840
what does the amu stand for
atomic Mass unit
what does the atomic number mean
how many protons there are.
what is an isotopes
an atom with the some number of proton but a different number of neutrons.
who invented the pattern of the first periodic table
Dmitri Mendeleev
how was Mendeleevs table organized
atomic mass
how are Modern periodic tables organized
atomic number
what r the color coded regions respond to what
class
list the order of an element
Atomic number
chemical symbol
atomic mass
what is row on the perodic table called
period
_______ are found on the right side or the periodic table and ________ is found on the left
metals, nonmetals
______ r the more reactive nonmetals
Halogens
_________ gasses r the least reactive nonmetals
Nobel
Are Lanthanides found in nature
yes
R Actindies found in nature
no
what is the range of atomic numbers on the Uranium table
93-118
where can some elements be created
labs
what is the range of the radioactive elements
84-118
good Job
thanks
