Atomic numbers and mass. Protons, electrons and neutrons.
Metal, Metalloid, Nonmetal
Families
Valence electrons and levels.
100
Who was Dimitri Mendeleev?
First person to make the periodic table.
100
What is the average atomic mass mean?
The mass of the atom.
100
What is a metal?
An element that is shiny and conducts heat and electricity well. Found in the middle and left.
100
Which family is on the far left side?
The Alkali family
100
Where do you find valence electrons?
You find valence electrons in the column the element is in. Column 13 is 3, Column, 14 is 4 and so on.
200
How did Mendeleev organized the first periodic table?
What is the average atomic mass?
200
What is the atomic number?
How many protons the atom contains.
200
What is a nonmetal?
An element that conducts heat and electricity poorly. Found on the far right.
200
Which family is in the middle?
The transition metals.
200
What is valence electrons?
Valence electrons are the electrons on the outermost level.
300
The average atomic mass was sometime off by one or two.
Why was arranging the periodic table by average atomic mass bad?
300
What is the average atomic mass and atomic number of Arsenic?
Average atomic mass is 74.92 and the atomic number is 33.
300
What is a metalloid.
An element with conducting abilities in the middle of metals and nonmetals. Any element with one whole side of the stair step is a metalloid, excluding aluminum.
300
Where are Halogens?
The 7th row.
300
What are energy levels, how do you find them, and what do they contain.
Energy levels are levels that float around the elements containing electrons. The row the element is in is the number of rings. For example row on has one energy level.
400
Who was Henry Moseley?
The person who changed how the periodic table was organized for the better.
400
What is similar the protons and electrons or the neutrons and electrons?
Protons and electrons are the same.
400
Is silicon and metal, nonmetal, or metalloid.
Silicon is a metalloid.
400
What family is boron apart of?
The boron family.
400
What is the most valence electrons something an energy level can contain?
8 at the most.
500
How did Moseley arrange the periodic table?
By the atomic mass.
500
How do you get the average atomic mass?
You add the Protons and neutrons.
500
Is aluminum a metal, nonmetal, or a metalloid?
Aluminum, even though it is on the sair step is an exception and a metal.