What Am I?
Has a positive charge.
proton?
The two regions of the atom.
nucleus and electron cloud / orbits / shell?
These royal snobs don't want to react with anybody.
Noble Gases
The number of periods in the Periodic Table.
seven
My symbol is O and my atomic mass is 16.
oxygen
I tell the number of protons contained inside an atom of an element.
atomic number
All of the mass of an atom is concentrated here.
nucleus
Contains the most reactive metals.
Alkali Metals
Rows in the Periodic Table.
periods
I have 16 electrons whizzing through my electron cloud.
sulfur
It takes 2000 of me to equal the mass of either of my subatomic partners.
electron
We live in the nucleus of an atom.
protons and neutrons
Contains two common metals, magnesium and calcium.
Alkaline Earth Metals
There are 18 of these in the Periodic Table.
groups or families
With an atomic mass of 39 and 20 neutrons in my nucleus, I am a very reactive metal.
potassium
Atoms with the same number of protons, but different number of neutrons.
isotopes
The two particles that are always found in the same number.
protons and electrons.
Not as reactive as the metals in groups one and two, the transition metals contain the most familiar metals like gold and silver and represents these groups.
Groups 3 through 12
Information that is contained within a square on the Periodic Table.
atomic number, element symbol, element name, and atomic mass
I am the head of my family in the Halogens, and an important element in helping fight tooth decay.
flourine
Why scientists use models to study atoms.
so small / can't view them
The smallest subatomic particle, but its cloud accounts for the volume of an atom.
the electron
Elements of this family can gain or lose 4 electrons when reacting with other elements. The head of this family is very important in the chemistry of life.
Carbon Family
Credited with developing the first Periodic Table of the Elements, he arranged the elements in order of increasing atomic mass.
Dmitri Mendeleev
My properties are so unique I have my own separate space on the Periodic Table. I was also the end of the Hindenburg.
hydrogen