Vocab
Are most of the elements on the periodic table classified as metal or non-metal?
Metal
What group is Iridum in?
Group 9
Oxygen has __ number of valance electrons.
6 (six)
What group is Zn in?
Group 12
What was the first Periodic Table arranged by?
Atomic mass
The vertical columm of elements in the Periodic Table is called?
Group
What group Sodium in?
Group 1
Neutrons and Protons make up the nucleus and equal ____.
Atomic mass
What period is Calcium in?
Period 4
What is the Periodic Table arranged by now?
Atomic number
What is a chemical symbol?
One or two letter abbreviation for an element
What period is Mt in?
Period 9
Fill in the blanks :
The noble gases have ____ electrons in their outer energy levels
A complete set of
The element in group 10 and period 5 is?
Pd = Palladium
Who made the invented the Periodic Table?
Dmitri Mendeleev
A horizontal row of elements in the Periodic Table is called?
Period
Which group is the least reactive?
Noble gases
An element that is very reactive gas is most likely a member of the ____?
Halogens
What is Hg?
Mercury
The only letter that is not in the Periodic Table is?
J
What is the definition of atomic number?
The number of protons in the nucleus of an atom
Elements in the same____are more chemically similar.
Group
As you look across a period, the number of valence electrons_______.
Increases
What is the atomic mass of Kr?
83.798
How many elements are in the Periodic Table?
118