History of Atoms
Who created the most famous model of an atom?
Niels Bohr
The positively charged particle found inside of a nucleus,. it has the mass of 1 amu.
Protons
In an atom, the protons charge is positive, a neutrons charge is neutral, and an electrons charge is....
Negative
Hydrogen is a.....
Nonmetal
What are Valence electrons?
Valence electrons are the number of electrons on the last ring.
Who created the first model of the atom?
John Dalton
The negatively charged particle found outside the nucleus in the electron cloud, it has a mass of 0 amu.
Electrons
Protons have a mass of...
1 amu
These elements that are found on the periodic table are malleable and they have a luster to them
The group number = what?
How many valence electrons each element has
Who created the second model in 1987?
JJ Thomson
The neutral particle found with the protons inside of the nucleus, it has a mass of 1 amu.
Nuetrons
Where are the electrons located in the atom?
Outside of the nucleus
These are chemical elements that form simple substances.
If an element is in group 2 how many valence electrons are there?
2
In 1911 Ernest Rutherford stated.......
"Electrons are mostly just outside the nucleus"
It is the smallest unit of matter that makes up everything we see, hear, and touch.
Atom
The electron provides _________ to the atom
Electricity
:These elements can be found as solids, liquids, and gases they are not confined to any one form like some others
Nonmetals
Hydrogen, Lithium, Potassium, Rubidium, Cesium, and Francium all have how many valence electrons.
One
What does Erwin Shrodingers model show?
His model shows that the electrons orbit in a cloud called the electron cloud.
It is the organization of all elements that have been discovered, It continues to grow to this day.
The periodic table
The neutron _____ the atom
Stabilizes
Einsteinium is a.....
Metal
What do valence electrons help determine?
The group the element is in