Atomic Structure Flashcards
Atoms are the basic building blocks of ____
Matter
What are the 3 parts of the atom?
Proton
Neutron
Electron
Atoms are ____ in charge because they have the same number of ____, ____, ____
Neutral
Protons
Neutrons
Electrons
Protons have a ____ charge
Positive
Protons live in the ____ of the atom
Nucleus
The number of protons determines the type of _____ and the _____ ____
Element
Atomic Number
Neutrons have a _____ charge
Neutral
Neutrons live in the ____
Nucleus
All atoms except ____ have neutrons and protons in the nucleus
Hydrogen
Electrons have a ____ charge
Negative
Electrons sit in electrons shells or ____ ____
Energy Levels
The first electron shell in an atom can hold ____ electrons
Two
The second electron shell in an atom can hold ___ electrons
Eight
An element is a substance that cannot be ____ ___ into simpler substances by ___ means
Broken down
Chemical
An element is comprised of ____ that have the same ___ ____
AToms
ATomic number
EAch atom in an element has the same number of ____, ____ and ____
Protons
NEutrons
Electrons
Every element has a unique ___ ___
Atomic number
An elements atomic number indicates the number of ___ and ____ in the ____
PRotons
Nuetrons
Nucleus
Normal atoms are ____ in charge so also has the same number of ____
Neutral
Electrons
Many element names are very ____
Old
Many elements are based on other languages similar to ____ ___
Chemical symbols
_____ is named after kholoros, the Greek word for “Greenish yellow.”
Chlorine
New names are approved by an ____ ___
International Committee
Every element is ____ using a unique ____ of one or two letters
Abbreviated
Symbol
The first letter of an element is always _____ and if there is a second letter it is ___ ___
Capitalized
Lower case
Some elements abbreviations are based on other languages - Fe is the abbreviation for ____
It is from the Latin word “ferrum”
Iron
Atomic mass is the mass of the ____ and ___ in an atom
Protons
Neutrons
_____ are so small they do not add to the mass of an atom
Electrons
The atomic mass of an element is a ____ because it is an average of the ____
Decimal
isotopes
____ are atoms of an element that have more or less ____ than the original element
Isotopes
Nuetrons
How do you calculate the number of neutrons in an atom
Subtract the atomic number from the atomic mass
The Bohr model of the atoms shows the electrons in what?
Rings around the nucleus
The electron cloud model of the atom shows electrons in what?
A cloud around the nucleus without defined layers
