What am I?
We are in the nucleus of the atom
Neutrons and protons
These electrons make up the outermost shell
Valence electrons
Atoms in the periodic table are arranged in this order
Atomic number
I tell the number of protons inside of an element
Atomic number
I am an atom with the same number of protons, but different number of neutrons
An isotope
Atoms that are chemically inert, or unreactive, have these
Full valence shells or electrons
As you move down the row in the periodic table, this increases
Energy levels/electron shells
This subshell holds 10 electrons
d
The number of neutrons is an element is found by subtracting these
Atomic mass - atomic number
I determine the chemical properties of an atom
Valence electrons
This is true of the electron configuration of noble gases
Completely filled valence electrons or outer shell
Atoms in the same group (column) have these in common
Number of valence electrons
Elements want to form ions because they want to be in this state
Full valence electrons/chemically inert
Number of protons
We make up the atomic mass of the atom
Protons and neutrons
When an element gains electrons, it becomes this charge
Negatively charged
Atomic radius decreases down a group due to this phenomenon
Increased attraction of electrons to the nucleus
The electron configuration of a +1 ion has how many electrons compared to a neutral atom
One less electron
The number of electrons in a positively charged ion is this
Less electrons than protons
I am an atom with differing number of protons and electrons
Ions
The energy levels of an atom are filled in this order
lowest to highest
This phenomenon explains why ionization energy increases from left to right
Electron shell stability/valence electrons
During atomic emission spectrum, electrons produce light when moving from these states
Excited state to ground state
The quantum mechanical describes electron behavior as this
Electron clouds