An element has 33 protons and 22 neutrons. What is the mass number?
55
100
The two regions of the atom.
What are nucleus and electron cloud?
100
Elements in this family contain helium
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
All of the mass of an atom is concentrated here.
What is the nucleus?
200
Contains the most reactive metals with 1 valence electron
What is the Alkali Metals?
200
Rows in the Periodic Table are called____.
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
The electrical charge of the nucleus is_____
positive
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
In a neutral atom, the number of these particles will be the same.
Protons & electrons
400
The mass of a proton is______
1 amu
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. These metals are in groups _____ through______
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
If an element has a mass number of 12 and has 7 electrons. What is the number of neutrons?
5
500
The smallest subatomic particle, but its cloud accounts for the volume of an atom.
What is the electron?
500
Elements in this group have four valence electrons. The head of this family is very important in the chemistry of life.
What is group 14
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 belong to my own group. I was also the end of the Hindenburg.