atom
is the smallest piece of an element that still represents that element
electron
is a particle with one negative charge
nucleus
most of an atom's mass and positive charge is concentrated in a small area in the center of the atom
proton
is an atomic particle that has one positive charge
neutron
is a neutral particle that exists in the nucleus of an atom
electron cloud
is an area around an atomic nucleus where and electron is most likely to be located
the smallest piece of the element gold is a gold...
atom
define electron cloud in your own word.
the electron cloud is the area around the atomic nucleus where the electron is very likely to be
what is an atom most likely made of?
empty space
write a sentence that describes the nucleus of an atom.
the nucleus of an atom has all of the positive charge and neutrons concentrated in it.
matter
anything that takes up space and has mass
mass
the amount of matter an object contains
volume
the amount of space an object occupies
atom
basic building block of matter
formula
LxWxH= volume of rectangle
block chart
5- # of protons
B- element symbol
Boron- element name
10.81-actomic mass
atomic number
the number of protons in an atom of an element
isotopes
atoms of the same element that have different numbers of neutrons
mass number
an atom is the sum of the number of protons and neutrons in an atom
radioactive
elements that spontaneously emit radiation
nuclear decay
is a process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation
ion
an atom that is no longer neutral beccause it has gained or lost electrons
Rutherford
gold foil-alpha particles most mass of atoms in nucleus
quarks
protons & neutrons smaller particles
6 types
names: up, down, charm, strange, top, & bottom
protons: 2 up- 1 down
neutrons: 2 down- 1 up