ATOMS
This is found in the center of the atom
NUCLEUS
There are ___ horizontal rows called _______ in the periodic table
7 HORIZONTAL ROWS called PERIODS
Where are the nonmetals found on the periodic table?
RIGHT SIDE
Element with the symbol Na
Sodium
Electrons in the last energy level
VALENCE ELECTRONS
The 2 sub-atomic particles found in the nucleus of the atom
PROTONS AND NEUTRONS
The periodic table has _____vertical columns called______
18 COLUMNS called GROUPS
Where are metalloids found on the periodic table?
BETWEEN METALS AND NONMETALS
The metalloid in period 2 with four valence electron
SILICON
These are poor conductors of heat and electricity
NONMETALS
Name the 3 subatomic particles of an atom
PROTONS
NEUTRONS
ELECTRONS
The maximum number of electrons that can be held in the 2nd energy level
8
True or False
There are more non-metals than metals in the periodic table
FALSE
Name the group that has 3 valence electrons
BORON (GROUP 13)
How do you find the number of neutrons for an element
SUBTRACT THE ATOMIC NUMBER/NUMBER OF PROTONS FROM THE ATOMIC MASS NUMBER
These particles have negative charge, they float around the nucleus and have the least or no mass
ELECTRONS
The periodic table is arranged by _________
Atomic Number ( which is also the number of Protons & Electrons)
Highly reactive metals in group 1
ALKALI METALS
Name the elements in group 18 which are mostly non reactive.
NOBLE GASSES
These elements share the properties of metals and nonmetals
METALLOIDS
The overall charge of an atom
NEUTRAL
Each square on the periodic table has 4 pieces of information about the element. Name them.
NAME
SYMBOL
ATOMIC NUMBER
ATOMIC MASS
This word means something can be hammered into thin sheets
MALLEABLE
This element is the basis of all life and found in anything organic
CARBON
Atoms of the same element with different number of neutrons
ISOTOPES