Type
Word Search
Description

nuclear model
atomic number
nucleons
neutrons
electrons
protons
nuclear binding energy
atomic mass
mass number
isotopes

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

atoms Crossword

Type
Crossword
Description

the smallest component of an element atom
Dense, positively charged mass at the center of an atom. nucleus
Positively charged subatomic particle found in the nucleus. proton
Neutral subatomic particle found in the nucleus. neutron
Negatively charged subatomic particle found outside the nucleus. electron
The sum of the protons and neutrons in the nucleus of an atom. mass number
This number identifies the element and is equal to the number of protons found in the nucleus. atomic number
An atom with a charge (unequal number of protons and electrons) ion
Versions of the same element with different numbers of neutrons. isotopes
The possible energies that an electron in an atom can have. energy levels
The weighted average mass of all of an element's isotopes' mass numbers (usually a decimal). atomic weight
A visual model showing the most likely locations for the electrons in an atom. electron cloud
The arrangement of electrons around the nucleus of an atom. electron configuration
When all of the electrons in an atom have their lowest possible energies. ground state
the property of a body that causes it to have weight mass
the property of something that is great in magnitude volume
a stable particle with positive charge proton
an elementary particle with negative charge electron
of or relating to constituents of the atom or forces within the atom subatomic
(nontechnical usage) a tiny piece of anything particle

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

chemistry Crossword

Type
Crossword
Description

states that mass is neither created nor destroyed during ordinary reactions or physical changes law of conservation of mass
if two or more different compounds are composed of the same two elements with a certain mass of the first element is always a ratio of small whole numbers law of multiple proportions
the fact that a chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound law of definite proportions
the smallest particle of an element that retains the chemical properties of that element atom
is a very small region located at the center of an atom nucleus
postively charged particles in the nucleus; mass of 1 amu proton
neutral particles in the nucleus of an atom; mass of 1 amu neutrons
negatively charged particles present in a cloud around the nucleus; have a mass of almost zero electrons
protons, neutrons and electrons subatomic particles
experiments done in this tube with electrons and a magnet cathode ray tube
Thomson's model for the atom; electrons are present scattered throughout a positive field plum pudding model
positively charged particles with about four times the mass of a hydrogen atom alpha particles
these short range proton-neutron, proton-proton, and neutron-neutron forces hold the nuclear particles together nuclear forces
the number of protons of each atom of that element atomic number
atoms of the same element that have different masses; vary in number of neutrons isotopes
the most common type of hydrogen; an isotope with one nucleon protium
isotope of hydrogen with a total of 2 nucleons deutrium
isotope of hydrogen with a total of 3 nucleons tritium
is the total number of protons and neutrons that make up the nucleus of an isotope mass number
the mass number is written with a hyphen after the name of the element hyphen notation
shows the composition of a nucleus (mass and atomic number) nuclear symbol
is a general term for a specific isotope of an element nuclide
1 amu, or is exactly 1/12 the mass of a carbon-12 atom atomic mass unit
is the weighted average of the atomic masses of the naturally occuring isotope of an element average atomic mass
6.0221415 x 10^23 is the number of particles in exactly one mole of a pure substance Avogadro's number
is the amount of a substance that contains as many particles as there are atoms in exactly 12g of carbon-12 mole
the mass of one mole of a pure substance molar mass
isotopes made in a lab artificial isotopes
a proton or neutron; particle found in the nucleus nucleon

Atomic Structure Crossword Puzzle

Type
Crossword
Description

The smallest unit of an element that maintains the properties of that element. Atom
A subatomic particle that has no change and that is found in the nucleus of an atom. neutron
A region around the nucleus of an atom whose electrons are likely to be found. electron cloud
A unit of mass that describes the mass of an atom or molecule. atomic mass unit
An atom's central region, which is made up of protons and neutrons. nucleus
An atom that has the same number of protons/atomic number as other atoms of the same element do but that has a different number of neutrons/atomic mass. isotope
The mass of an atomn expressed in atomic mass units. atomic mass
A subatomic particle that has a positive charge and that is found in the nucleus of an atom. proton
A subatomic particle that has a negative charge. electron
The sum of the number of protons and neutrons in the nucleus of an atom. mass number
The number of protons in the nucleus of an atom; the atom's number is the same for all atoms of an element. atomic number
Plays in radioactive atoms that changes a neutron to a proton or electron. weak force
A type of physical that occurs between electrically charged particles. electromagnetic force
The force that holds particles together in the atomic nucleus. strong force
A force that attracts any objects with mass. gravitational force

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

Nuclear Chemistry Vocabulary Crossword

Type
Crossword
Description

The ability of radiation to pass through matter Penetrating Power
Isotopes of atoms with unstable nuclei Radioisotope
A form of high energy electromagnetic radiation emitted from some materials that are in an excited electron state X-Ray
High energy radiation that accounts for most of the energy lost during radioactive decay Gamma Ray
Radiation that is made up of alpha particles and is deflected toward a negatively charged plate when radiation from a radioactive source is directed between two electrically plates Alpha radiation
Radiation that is made up of beta particles and is deflected toward a positively charged plate when radiation from the radioactive source is directed between two electrically charged plates Beta radiation
A radioactive decay process that occurs when an atom's nucleus draws in a surrounding electron, which combines with a proton to form a neutron, resulting in an x-ray photon being emitted Electron capture
The time required for one-half of a radioisotope's nuclei to decay into its products Half-life
Protons and neutrons Nucleon
A particle that has the same mass as an electron but an opposite charge Positron
A radioactive decay process in which a proton in the nucleus is converted into a neutron and a positron, and then the positron is emitted from the nucleus Positron emission
A series of nuclear reactions that starts with an unstable nucleus and results in the formation of a stable nucleus Radioactive Decay Series
The process that is used to determine the age of an object by measuring the amount of a certain radioisotope remaining in that object Radiochemical dating
A force that acts on subatomic particles that are extremely close together and overcomes electrostatic repulsion among protons Strong Nuclear force
A reaction in which an atom's atomic number is altered Transmutation
A nuclear reactor that is able to produce more fuel than it uses Breeder reactor
The minimum mass of a sample of fissionable material necessary to sustain a nuclear chain reaction Critical mass
The difference in mass between a nucleus and its component nucleons Mass defect
The splitting of a nucleus into smaller, more stable fragments, accompanied by a large release of energy Nuclear Fission
The process of binding smaller atomic nuclei into a single, larger, and more stable nucleus Nuclear fusion
A nuclear fusion reaction Thermonuclear reaction
The process in which nuclei are bombarded with high-velocity charged particles in order to create new elements Induced Transmutation
An element with an atomic number of 93 or greater on the periodic table Transuranium element
Radiation that is energetic enough to ionize matter it collides with Ionizing Radiation
An isotope that emits non-ionizing radiation and is used to signal the presence of an element or specific substance Radiotracer

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

Periodic Table Puzzle Crossword

Type
Crossword
Description

What are positively charged particles of the atom? protons
What are negatively charged particles of an atom? electrons
What particle of anatom has no charge? neutrons
Where are protons found? nucleus
Where are electrons found? electron clouds
An _______ is an atom that has the same number of protons but a different number of neutrons as other atoms of the same element. isotope
The ____ ______ is the total number of protons and neutrons. mass number
What detrmines the identity of an atom? atomic number
What is an average of the masses of all naturally occuring isotopes of an element? Atomic mass
The electrons in the outermost energy level of an atom are called _______ _________. valence electrons
Alkali Metals only have ___ valence electron? one
Valence electrons determine the _____ of which an element si placed. group
Lithium is a? alkali metal
Is Flourine a metal or nonmetal? nonmetal
A ______ loses an electron and becomes positively charged. cation
A _____ gains an electron and becomes negatively charged. anion
A row of elements is called a ______. period
What are charged particles that form during chemical changes? ions
What is it called when 2 atoms of nonmetals bond? covalent bonding
What is it called when a metal reacts with a nonmetal? ionic compounds

Unit 3 Crossword Puzzle

Type
Crossword
Description

Negative charge of an atom electron
Center part of an atom that holds protons and neutrons nucleus
Positive charge of an atom Proton
Neutral Charge of an atom Neutron
Area in an atom where an electron is found Electron Cloud
Substance that cannot be broken down into smaller parts Element
Number or protons in an atom Atomic number
Atoms of the same element that have different amounts of neutrons Isotopes
Average mass of an element's isotopes Average Atomic Mass
Chart that shows the elements Periodic Table
When 2 or more elements combine Compound
Atom that is no longer neutral because of gained/lost electrons Ion
Chemical bond by sharing of valence electrons Covalent Bond
Chemical Reaction that releases energy exothermic
Chemical reaction that absorbs energy endothermic
Substance that speeds up a chemical reaction catalyst
Symbol for Iron FE
Vertical columns on the Periodic Table are called families
Horizontal rows on the Periodic Table are called periods