Periodic Table
What are the rows on the periodic table called?
Periods
Name of the positive subatomic particle
Proton
Which subatomic particles are found in the nucleus?
Protons and Neutrons
This scientist developed a model with electrons moving in fixed orbit.
Bohr
How do you know the number of electrons in an atom
Same as the protons unless it is a charged ion
What are the columns on the periodic table called?
Groups or Families
What are the three subatomic particles in an atom?
Protons
Electrons
Neutrons
How many total electrons can fit in an "s" orbital?
2
This scientist was the one credited with discovering the nucleus.
Rutherford
What is the atomic number
the number of protons in an atom (the top number)
The periodic table is arranged in order of increasing ___________
Atomic number (protons)
What is the name of the negative subatomic particle?
Electron
Where are the electrons found?
the Electron cloud (outside the nucleus)
How many valence electrons does Chlorine have?
7
How do you find how many neutrons are in an atom
subtract the atomic mass by the atomic number
What is the name of group 18?
Noble Gases
Which two subatomic particles have approximately the same mass?
Protons & neutrons
Where is the mass of an atom located?
the Nucleus
This is the scientist associated with the modern model of the atom.
Schrodinger
What element has an average atomic mass of 12.01
Carbon
What is the name for the type of elements found on the stair steps on the periodic table?
metalloids
What is the most stable number of valence electrons?
8
Lithium-7 has how many neutrons?
4 neutrons
This was the first scientist to develop a model of the atom as a solid sphere
Dalton
What are the protons, electrons, and neutrons of the element hydrogen?
Protons = 1
Electrons = 1
Neutrons = 0