The two regions of the atom contain these subatomic particles.
What are protons and neutrons in thenucleus and electrons in the electron cloud?
100
These royal snobs don't want to react with anybody.
What are the Noble Gases?
100
The number of periods in the Periodic Table.
What is seven?
100
My symbol is O and my atomic mass is 16.
What is oxygen?
200
I tell the number of protons contained inside an atom of an element.
What is the atomic number?
200
The mass number is the sum of these.
What are the number of protons and neutrons?
200
Contains the most reactive metals.
What is the Alkali Metals?
200
Rows in the Periodic Table.
What are periods.
200
I have 16 electrons whizzing through my electron cloud.
What is sulfur?
300
It takes 2000 of me to equal the mass of either of my subatomic partners.
What is an electron?
300
83 Bi 208.9804 has this many protons, electrons (neutral atom) and neutrons.
What are 83 protons, 83 electrons and 126 neutrons?
300
Contains two common metals, magnesium and calcium.
What is the Alkaline Earth Metals?
300
There are 18 of these in the Periodic Table.
What are groups or families?
300
With an atomic mass of 39 and 20 neutrons in my nucleus, I am a very reactive metal.
What is potassium?
400
Atoms with the same number of protons, but different number of neutrons.
What are isotopes?
400
I am the isotope Fluorine-18. I have how many protons, electrons and neutrons
What are 9 protons, 9 electrons and 9 protons.
400
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.
What are Groups 3 through 12?
400
Information that is contained within a square on the Periodic Table.
What are atomic number, element symbol, element name, and atomic mass?
400
I am the head of my family in the Halogens, and an important element in helping fight tooth decay.
What is flourine?
500
Why scientists use models to study atoms.
What is being so small?
500
I have 34 protons, 36 electrons and 45 neutrons. My complete symbol is .....
What is the 34 Se 79 -2?
500
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.
What is the Carbon Family?
500
Credited with developing the first Periodic Table of the Elements, he arranged the elements in order of increasing atomic mass.
Who is Dmitri Mendeleev?
500
My properties are so unique I have my own separate space on the Periodic Table. I was also the end of the Hindenburg.