Type
Crossword
Description

Smallest unit of matter Atom
The mass of an atom Atomic Mass
Determines the amount of protons and the placement of the element on the periodic table Atomic Number
A beam of electrons emitted from the cathode of a high-vacuum tube Cathode Ray
Negatively charged particle Electron
Elements that have the same number of protons but different number of neutrons Isotope
Particle with no charge Neutron
The brain of an atom, holds the protons and neutrons Nucleus
Positively charged particle Proton
Introduced the idea of atoms Democritus
Confirmed that all matter is composed of atoms John Dalton
Discovered the electron J.J. Thomson
Discovered the proton Ernest Rutherford
Created the Bohr Model Niels Bohr
Created the first periodic table Dimitri Mendeleev
Famous for his uncertainty principle Warner Heisenberg
In a certain amount of time the element cuts in half Half-Life
A version of an element that is unstable Radioisotope
Experiment done by Ernest Rutherford Gold foil experiment
Model made by J.J. Thomson Plum pudding model

Atom Crossword

Type
Crossword
Description

Who first suggested the existence of the atom Democritus
He found that the rays were attracted by positively charged metal plates but repelled by negatively charged ones. Thomson
He did not confirm Thomson's model: used gold foil in experiment. Rutherford
Electrons ---------------- the positively charged nucleus. orbit
His model postulated the existence of energy levels or shells of electrons. Bohr
Believed all matter was made from fire, water, air earth. Aristotle
Sub-atomic particles found in protons and neutrons. quarks
The number of protons and neutrons in an element is -------. equal
These sub particles are positive. protons
The sub particles are negatively charged. electrons
On an atomic model electrons are noted on an electron ----------- cloud
Protons plus neutrons equal ---------- --------- atomic mass
The center of an atom is called the ---------. nucleus
The number of electrons is the same as an atom's -------- ----------- atomic number
To find the number of neutrons in an atom, you ------- the number of protons from the atomic mass number for the element. subtract
Atomic mass is usually a ------ number decimal
Matter -------- ------- be created or destroyed. cannot
Isotopes have the same number of protons but a --------- number of neutrons. different
Only ----- electrons can be in the inner most orbit. two
Each element has its own -------- properties
This microscope can be used to see an atom STM
The ------- -------- shows the organization of all known elements Periodic Table
You find the ---------- atomic mass of isotopes to determine atomic weight o that element average
The symbol for gold is Au
The symbol for hydrogen is ----- H
Calcium has --------- protons. twenty

THE HISTORY OF THE ATOM Crossword

Type
Crossword
Description

Henri Bacqueral discovered the __________ of atoms' magnetism and radioactivity matter
Aristotle thought there was not a smallest part of ______ . elements
The ____ is the amount of matter in an object. mass
_____________ is a change in the velocity of an object, mass, or body. Acceleration
A ________ is an element or compound. chemical
Marie and Pierre Curie worked with mysteries of _________ and radioactivity. chemistry
An ____ is the smallest unit of an element. atom
The _______ is in the middle of the atom. nucleus
J.J. Thomas discovered the ______ model. atomic
An _______ is a negatively charged part of an atom. electron
A ______ is a positively charged part of an atom. proton
Ernest Rutherford discovered the _______. nucleus
Robert Millikan was interested in J.J. Thomas and his _________. electrons
A _____ is the energy level where the electrons are found. shell
___________ is the spontaneous disintegration of the nucleus. Radioactivity
An _______ is a pure substance that cannot be broken down into simpler substances by chemical reactions. element
Neils Bohr changed the _____of electrons. orbit
A ________ is a material formed by joining elements. compound
An ___ is an electrically charge particle (positive or negative). ion
Antonie Lavoiser put the first table of ________ together. elements

Atomic Theory History and Vocab. Review Crossword

Type
Crossword
Description

Who created the Atomic Theory in 1803? Dalton
Who created a model of atoms that includes electrons orbiting a small nucleus in 1913? Bohr
Who used to cathode ray tube to discover the presence of electrons in 1898? Thomson
Who performed the gold foil experiment in 1909, which lead to the conclusion that atoms are mostly empty space? Rutherford
A unit of matter, the smallest unit of an element, having all the characteristics of that element. Atom
The positively charged central region of an atom, composed of protons and neutrons and containing almost all of the mass of the atom. Nucleus
A subatomic particle with a positive electrical charge, forming part of the nucleus of an atom. Proton
A subatomic particle with a neutral electrical charge, forming part of the nucleus of an atom. Neutron
A subatomic particle with a negative electrical charge, found outside the nucleus of an atom. Electron
The number of protons in the nucleus of an atom of an element. Atomic Number
An abundance-weighted average of the masses of all the isotopes of an element. average atomic mass
The total number of protons and neutrons in the nucleus of an atom. mass number
Any of the several different forms of an element each having different mass numbers. Isotope

Atomic Structure Word Search

Type
Word Search
Description

orbital
energy levels
plum pudding
aristotle
democritus
ion
isotopes
subatomic
nucleus
element
bohr
positive
negative
rutherford
electron cloud
thomson
dalton
atomic mass
electrons
atomic number
neutrons
protons
atoms

atoms and molecules Word Search

Type
Word Search
Description

oxygen atom
water molecule
sodium chloride
electrical charge
neon
quark
isotope
energy level
matter
chemical bond
ionic bond
covalent bond
nuclear force
electromagnetic force
hydrogen
bohr model
atomic theory
elements
periodic table
carbon
nobel gases
ion
electron cloud
orbitals
atomic mass
subatomic particle
nucleus
neutron
electron
proton

Atom & Element Crossword

Type
Crossword
Description

The amount of the masses of the naturally occurring isotopes in an element ATOMIC MASS
A column on the periodic table, also called a family, containing elements with the same number of valence electrons CHEMICAL GROUP
An abbreviated one or two letter symbol, used to write an element's name, beginning with a capital letter. CHEMICAL SYMBOL
The Greek scientist who named the atom, "atomas" meaning indivisible. DEMOCRITUS
The negatively charged particle in the electron cloud ELECTRON
One of a hundred or so pure substances that cannot be broken down into simpler substances ELEMENT
Regions inside the atom where electrons are likely to be found. ELETRIC CLOUD
The scientists who worked with thomson and added the nucleus to the modern model of the atom, using gold foil experiment. ERNEST RUTHERFORD
The scientists who discoved negatively charge particles (electrons), using Cathode Ray tube experiment JJ THOMSON
The scientist who started the modern atomic theory and confirmed Democritus' model of the indivisible atom JOHN DALTON

Matter and Atoms Crossword

Type
Crossword
Description

Everything/anything that takes up space matter
Can’t be broken down any longer (an atom) element
people who need to take notes homeslices
First person to think of the atom Democritus
He performed experiments with various chemicals that showed that matter seemed to consist of elementary lumpy particles (atoms) Dalton
In 1897, the English physicist discovered the electron and proposed a model for the structure of the atom. he knew that electrons had a negative charge and thought that matter must have a positive charge Thompson
In 1911 he thought it would be interesting to bombard atoms with these alpha rays, figuring that this experiment could investigate the inside of the atom. rutherford
came up with a theory that said the electrons do not spiral into the nucleus and came up with some rules for what does happen. bohr
the whole number on the periodic table atomic number
decimal on the periodic table atomic weight
the negative charge of an atom electron
the neutral part of an atom neutron
the positive part of the atom proton
the chart where all of the elements are periodic table
J.J. Thompson's atom model's name Plum Pudding
The people who are going to get an A for this Sophie and Olga

Atoms and elements Cross word

Type
Crossword
Description

The negatively charged particle in the electron cloud. Electron
A particle in the nucleus that is positively charged Proton
A particle in the nucleus with a neutral, or no charge Neutron
A tiny, dense positively charged region in the center of an Atom Nucleus
Particles, like protons, neutrons, and electrons that are smaller than atoms Subatomic particles
Regions inside the Atom where electrons are likely to be found. This model developed by Schrodinger, is called Quantum Theory Electron Cloud
The number of protons in an element Atomic Number
The average of the masses the neutrally occurring isotopes in element Atomic mass
The arrangement of elements on a table based on their atomic number Periodic table
A column on the periodic table, also called a family containing elements with the same number of Valence electrons Chemical group
one of a hundred or so pure substances that cannot be broken down into simpler substances Element

Atoms Vocab Crossword

Type
Crossword
Description

THE NEGATIVELY CHARGED PARTICLE IN THE ELECTRON CLOUD ELECTRON
A PARTICLE IN THE NUCLEUS WITH A POSITIVE CHARGE PROTON
A PARTICLE IN THE NUCLEUS WITH A NEUTRAL CHARGE NEUTRON
THE TINY, DENSE, POSITIVELY CHARGED REGION IN THE CENTER OF THE ATOM NUCLEUS
PARTICLES, LIKE PROTONS, NEUTRONS, AND ELECTRONS, THAT ARE SMALLER THAN THE ATOM SUBATOMICPARTICLE
REGIONS INSIDE THE ATOM WHERE ELECTRONS ARE LIKELY TO BE FOUND ELECTRONCLOUD
THE NUMBER OF THE PROTONS IN THE ELEMENT ATOMICNUMBER
THE AVERAGE OF THE MASSES OF THE NATURALLY OCCURRING ISOTOPES IN AN ELEMENT ATOMICMASS
THE ARRANGEMENT OF ELEMENTS ON A TABLE BASED ON THEIR ATOMIC NUMBER PERIODICTABLE
A COLUMN ON THE PERIODIC TABLE, ALSO CALLED A FAMILY, CONTAINING ELEMENTS WITH THE SAME NUMBER OF VALENCE ELECTRONS CHEMICALGROUP
A HORIZONTAL ROW ON THE PERIODIC TABLE PERIODS
ONE OF A HUNDRED OR SO PURE SUBSTANCES THAT CANNOT BE BROKEN DOWN INTO SIMPLER SUBSTANCES ELEMENT
AN ABBREVIATED, ONE OR TWO LETTER SYMBOL, USED TO WRITE AN ELEMENTS NAME, BEGINNING WITH A CAPITAL LETTER CHEMICALSYMBOL
THE GREEK SCIENTIST WHO NAMED THE ATOM "ATOMAS" MEANING INDIVISIBLE DEMOCRITUS
THE SCIENTIST WHO THEORIZED THAT ELECTRONS ORBIT THE NUCLEUS OF THE ATOM LIKE PLANETS NEILSBOHR
THE SCIENTIST WHO WORKED WITH THOMSON AND ADDED THE NUCLEUS TO THE MODERN MODEL OF THE ATOM ERNESTRUTHERFORD
THE SCIENTIST WHO STARTED THE MODERN ATOMIC THEORY & CONFIRMED DEMOCRITUS' MODEL OF THE INDIVISIBLE ATOM JOHNDALTON
THE SCIENTIST WHO DISCOVERED ELECTRONS, USING CATHODE RAY TUBE EXPERIMENT JJTHOMSON

History Of The Atom Wordsearch

Type
Word Search
Description

Alpha Particles
Oil Drop Experiment
Plum Pudding Model
Cathode Rays
Maltese Cross
Paddle Wheel
A.M.U.
Atom
Electrons
Neutrons
Protons
Nucleus
Rutherford
Thomson
Greeks
Crookes
Millikan
Dalton
Chadwick