What are the horizontal rows on a periodic table called?
100
Metals
What type of elements make up most of the periodic table?
100
The number of Neutrons
What changes in isotopes of elements?
100
Indivisible
What is the meaning of atom?
100
Period 6
What period were the Lanthanoids pulled from?
200
Groups or Families
What are the vertical columns on the periodic table called?
200
Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Polonium and Astatine
What are the 8 metalloids that make up periodic table?
200
Isotopic Notation
What is it called when the atomic mass is at the top left of a symbol and the atomic number is at the bottom left of a symbol?
200
They are found in the same group
How can you tell the elements that are the most similar?
200
Actinium
What is the first element in the Actinoids?
300
Alkali Metals
What is group 1 on the periodic table called?
300
Gallium
What element was used to make the disappearing spoon?
300
The sum of protons and neutrons in an atom
What is the mass number or atomic mass?
300
8
How many electrons fill the outermost energy level of an atom?
300
Tin
Which element has 69 neutrons and 50 protons?
400
Transition metals
What are the elements that make up Families 3-12 called on the periodic table?
400
It has a very low melting point of 84 Degrees Fahrenheit
Why does Gallium dissolve or dissapear in hot tea or coffee?
400
Move the decimal two places to the left
What do you do to the percentage when finding the average atomic mass?
400
2
How many electrons fill the first energy level shell of an atom?
400
Carbon, Hydrogen, Nitrogen, Oxygen, Phosporus, Sulfur, and Selenium
What elements are necessary for Life CHNOPS
500
They have seven electrons in the outer most shell and only need one to complete that shell
Why are halogens so reactive?
500
Solitaire
What card game was Dmetri Mendeleev playing when he discovered how to arrange the periodic table?
500
Electrons are attracted to protons so there is a force that holds the electrons outside the nucleus and protons and neutrons are held together inside the nucleus by a force.
What is the difference between electromagentic force and strong force?
500
Noble Gases because they have 8 electrons in their outermost shell.
What group tends to be the least reactive on the periodic table and why?
500
Aluminum, Gallium, Tin,Indium,Thallium, Lead, and Bismuth