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What Am I?
Atomic Parts
All In The Family
Nuclear Energy
It's Elementary
100
Has a positive charge.
What is a proton?
100
The two regions of the atom.
What are nucleus and electron cloud?
100

These royal snobs don't want to react with anybody.

What are the Noble Gases?

100

Radioactive decay occurs when

Unstable nuclei release energy or particles

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.

What is Group 1

200

Why is nuclear fusion considered a promising future energy source?

It creates large amounts of energy from small atoms and produces less radioactive waste than fission

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
We live in the nucleus of an atom.
What are protons and neutrons?
300

Contains two common metals, magnesium and calcium.

What is Group 2

300

During alpha decay, an atom loses:

The splitting of a large nucleus

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
The two particles that are always found in the same number.
What are protons and electrons.
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

. A radioactive sample starts with 120 grams. Half-life = 5 years. How much remains after 5, 10, and 15 years?

60g, 30g, 15g

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
The smallest subatomic particle, but its cloud accounts for the volume of an atom.
What is the electron?
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 Group 14.

500

A sample has a mass of 200 grams. After 12 years, only 25 grams remain. How many half-lives occurred? What is the half-life?

3 half lives have occurred and this elements half life is 4 years. 

500
My properties are so unique I have my own separate space on the Periodic Table. I was also the end of the Hindenburg.
What is hydrogen?