Atom Basics
What can you predict about an element by its location on the periodic table?
its properties
What does the atomic number represent?
# of protons=#of electrons
Elements in the same Group of the periodic table have the same number of
have similar physical or chemical characteristics of the outermost electron shells of their atoms.
What does the atomic mass represent?
# protons+ #neutrons
What particles travel around the nucleus of an atom? And what is that area called?
electron, electron cloud
Elements in the same period of the periodic table have the same number of
electron shells
What four things are included in an element's square?
atomic number, atomic mass, symbol and element name
What other particle of an atom is equal to the number of protons?
Group 1 elements are called the _________ metals, and are considered the most _____________.
Alkali, reactive
How many neutrons does Bromine have?
45 neutrons
How many electron shells does Iron have?
Iron has 4 electron shells
What are the halogens on the periodic table?
fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At)
Which element is more reactive? Sodium (Na) or Platinum (Pt)
Sodium (Na)
Protons 11, electrons 11, Neutrons 12