Unit 9
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an atom is
the fundamental particle of an element and the smallest unit
an element is
any substance that cannot be broken down by ordinary chemical means. It is composed of only one type of atom and is represented by symbols on the periodic table. Example: Oxygen - O
a molecule is
a particle made up of two or more atoms chemically joined together. It is the basic unit of a covalent compound. Example: Molecular Oxygen - O2
a compound is
a substance formed when two or more atoms of different elements chemically joined together. These elements are chemically bonded. Example: Water - H2O
copper in the Bible
represent strength for God’s chosen people
gold in the Bible
a symbol of value and riches that sometimes represents the believer
iron in the Bible
represent power and dictatorship / the highest level
lead in the Bible
represents corruption and weakness / temporary
silver in the Bible
biblical currency. Represents Purity and strength
sulfur in the Bible
a symbol of God’s judgment mentioned often in the Book of Revelation
tin in the Bible
mind in biblical times often used with copper
a proton is
a positively charged particle in the nucleus of an atom that is over 1826 times heavier then an electron
an electron is
a negatively charged particle located outside the nucleus of an atom that has an extremely small Mass
a neutron is
a neutral particle in the nucleus of an atom with the same mass as a proton
atomic mass is
total of the masses of particles in an atom measured in atomic mass units
atomic number is
the number of protons in the nucleus of an atom. Each element has a specific atomic number
mass number is
the sum of the protons and neutrons in the nucleus of an atom
Isotopes are
atoms of the same element with different numbers of neutrons in their nuclei (same atomic number, different Mass numbers)
families on the periodic table
families are vertical columns on the periodic tables also known as a groups. Family member share properties
periods on the periodic table
periods are horizontal rows on the periodic table also known as series.
the number and arrangement of electrons is directly related to
where an element is found on the periodic table
electrons are found outside the nucleus in an
electron cloud
the number of electrons is equal to
the number of protons
electrons within clouds have varying amounts of energy so scientists have modeled this by placing electrons in
different energy levels