Vocab 2

vocab

published on October 31, 201025 responses 0 4.5★ / 5

The sum of the protons and neutrons in the nucleus of an atom

proton
electron
mass number

when the properties of the elements repeat in each period or row of the table

group
atomic mass
periodic table

The smallest particle of and element

element
atom
energy level

the tables vertical columns

groups
periodic table
chemical symbol

an element that lacks most of the properties of a metal

diatomic molecule
nonmetal
halogens

the spontaneous emersion of radiation by an unstable atomic nucleus

beta particle
alpha particle
radioactive decay

radioactive isotopes that can be followed through the steps of a chemical reaction or a industrial process.

tracer
radio activity
alpha particle

a class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity

reactivity
metal
alki metal

the ability of an abject to transfer hear or electricity to another object

malleable
corrosion
conductivity

the elements in group 18 of the periodic table

noble gasses
tracer
ductile