Structure
The location of most of the mass of the atom.
Center of atom-Nucleus
He theorized that elements are composed of tiny indivisible particles called atoms, which are identical for each element.
Who is John Dalton?
What is a cation?
Negative ion
Where are the electrons inside an atom?
outside the nucleus
Who is the father of the Periodic Table?
Dimitri Mendeleev
The components of an atomic nucleus.
What are protons and neutrons?
a small negatively charged particle which led to the "plum pudding" model.
Electron
What charge does an atom with 12 protons and 10 electrons have?
+2
This particle has a relatively no mass
What is the electron?
Metal, Nonmetal, or metaloid? Thorium (Th)
metal
The sum of the number of protons and number of neutrons.
mass number
Who discovered that atoms are mostly space?
Ernest Rutherford
How many electrons does As-3 have?
36
Which sub atomic particle gives an element it's identity?
proton
Why are the Noble Gasses called that?
Because the have a full outer shell, are stable and don't need to gain of lose electons so don't need to react with any other elements
What every carbon atom has six of.
What is protons?
Ernest Rutherford discovered that the mass and the positive charge of an atom are concentrated here.
What is the nucleus?
Write the symbol for an atom with 31 p+, 70 neutrons, and 28 e-?
10131Ga+3
Which atomic particle varies in isotopes?
neutron
What is the name of group 2?
Alkaine Earth Metals
How many electrons are in the nucleus of a neutral atom with the atomic number of 20?
20
Neils Bohr theorized that electrons are organized in
What are energy levels?
How many protons, neutrons, and electrons does lead-207 have
82 protons
125 neutrons
82 electrons
Which sub atomic partcle is involved in bonding
electrons
How many elements in period 3 are nonmetals?
4