The Elements and Periodic Table-Chapter 15
# of electrons transition elements have in the outer energy level
2
Physical Change
A change that does not result in a new substance being formed
Chemical Change
A change that transforms one substance into a different substance
Periodic Table
A chart that organizes the elements by their chemical properties and increasing atomic #'s
Group
A column in the Periodic Table
Electrical Conductor
A material that allows electricity to flow through easily
Thermal Conductor
A material that allows heat to flow easily
Insulator
A material that slows down or stops the flow of either heat or electricity
Period
A row in the Periodic Table
Atomic Mass Unit
A unit of mass = to 1.66 x 10-24
Most reactive metals are called ______
Alkali
_________ is a different form of a element due to different arrangements of of atoms
Allotrope
An _____ is formed by metals; contains more than one element and has metallic properties
Alloy
I am a member of the boron family and am the most abundant metal in Earth's crust
Aluminum
________ is the most abundant element in Earth's crust
Aluminum
Steel
An alloy of Iron and Carbon
What does AMU mean?
Atomic Mass Unit
I am the only element in the halide family that is a liquid
Bromine
I have 20 neutrons and am found in your teeth and bones
Calcium
I am the head of the carbon family known as the "basis of life"
Carbon
______ is a element that contains 80% of known compounds
Carbon
My atomic mass (weight) is 35.453
Chlorine
Each element in a period is in a _________ group
Different
Alkali Metals
Elements in the first group of the Periodic Table
Halogens
Elements in the group containing Fluorine, Chlorine, Bromine, and among others
Noble Gases
Elements in the group containing Helium, Neon, and Argon, and among others
Non-Metals
Elements that are poor conductors of heat and electricity
Metals
Elements that are typically shiny and good conductors of heat and electricity
Vertical columns in the Periodic Table are called ________
Families
I am a gas with a mass # of 19
Fluorine
My atomic # is 79
Gold
Family of "salt-producing" elements are called ________
Halogens
I am a noble gas with 2 electrons
Helium
______ is a gas element safe to use in balloons
Helium
I am not really a alkali metal, but since I have only 1 electron I behave just like them
Hydrogen
________ is odorless, tasteless, colorless gas; lightest of all elements
Hydrogen
I am a member of the halide family with the atomic # of 53
Iodine
I have 26 protons
Iron
Most widely used metal is ____
Iron
I am a member of the carbon family often mistaken for the end of your pencil
Lead
I am a member of the alkaline earth metals used to make fireworks and medicines
Magnesium
I am a transition metal with 25 electrons
Manganese
I am a metal that is liquid at room tempature
Mercury
_______ is the only metal liquid at room temperature
Mercury
Elements on the left side of the Periodic Table are called ______
Metals
I am a metal with 28 electrons
Nickel
I make up 78% of of the air and found in the 15th group
Nitrogen
Family in group 18 on the Periodic Table
Noble Gases
Elements on the right side of the Periodic Table are called _________
Non-Metals
___ is natural material from which metals can be profitably extracted
Ore
_______ compounds that contain carbon
Organic
I am a gas with with 8 protons and 8 neutrons
Oxygen
Horizontal rows on the Periodic Table are called...
Periods
I am a member of the nitrogen family with 16 neutrons
Phosphorus
I am the first element in the 4th period used in making fertilizer
Potassium
Elements in families have similar __________
Properties
I am the 2nd most abundant element in the Earth's crust and have 14 neutrons
Silicon
_______ is the second most abundant element in Earth's crust; found in glass and sand
Silicon
My atomic # is 47 and I am used to make photographic film
Silver
I am a silvery white metal used to make salt
Sodium
I have 2 electrons in the first shell, 8 in the second shell, and 6 in the third shell
Sulfur
Atomic Mass
The average mass of all the known isotopes of an element expressed in AMU
Periodicity
The repeating pattern of chemical and physical properties of the elements
You can find me in the carbon family in the 5th period
Tin
Elements in Groups 3-12 on the Periodic Table are called __________
Transition
I am a transition metal with 30 electrons useful in making paint
Zinc
What is another name for halogen?
halide