Vocabulary
The average mass of all the isotopes of that element.
Atomic Mass
The periodic table is organized in vertical columns called ______.
Groups or Families
What is the chemical symbol for Lithium?
Li
How do you find the number of protons?
Atomic Number of that element
What are the physical properties of metals?
Luster - Shiny and Reflective
Malleability - Can be hammered or rolled into flat sheets or other shapes
Ductility - Can be pulled out or drawn into long wires (Copper)
Conductivity
Thermal Conductivity - Ability of an object to transfer heat
Electrical - Ability of an object to transfer electricity
Magnetic - attracted to magnets (Iron, Nickel)
Most are solid at room temperature.
Mercury, Hg is liquid at room temperature
Center of the atom that contains the protons.
Nucleus
The periodic table is organized in horizontal rows called ______.
Periods
What period is Sulfur found in?
3
How do you find the number of electrons?
The atomic number of that element
What group of metals are the most reactive?
Alkali Metals or Group 1
A term used to describe material that can be hammered or rolled into flat sheets.
Malleable
The Periodic table has _____ periods and _____ groups.
7 periods and 18 groups
The table is made mostly of ______.
Metals
How do you find the number of neutrons?
The elements atomic mass - the atomic number
Which metal is in liquid form at room temperature?
Mercury
The gradual wearing away of a metal element due to a chemical reaction.
Corrosion
Nickel (Ni) is part of what group? Number and Name
10 and Transition Metals
Hydrogen is part of what group?
Nonmetals
How many protons does Cobalt have?
27
Nonmetals, are they good conductors of heat and electricity?
No, they are poor conductors
A substance that can conduct electric current under some conditions.
Semiconductor
What group is the least reactive group?
18 or Noble Gas
Another name for metalloids
Semi Metal
How many neutrons does Bismuth have?
208.98 = 209
209 - 83 = 126 neutrons
Who constructed the most recent periodic table?
Mendeleev