Ancient Atoms
Laws & Scientists
Astonishing Atoms
Periodically Happy
Groups with Gusto!
100

Aristotle argued that all substances were built from these 4 elements.

Earth, air, fire and water

100

He developed the first atomic theory

Who is John Dalton

100

The number of protons in an atom

What is an Atomic number

100

This means repeating

What is Periodic

100

This group consists of shiny, malleable metals and are the most reactive group

What is Alkali Metals

200

The Greek Philosopher who called the smallest, uncuttable piece of matter, "atomos." 

Who is Democritus

200

Matter cannot be created or destroyed, but it can change forms

What is the Law of Conversation of Mass

200

The sum of the protons and neutrons in the nucleus of an atom

What is mass number

200

He was a teacher of chemistry and found a way of organizing 63 known elements for a textbook he was writing. 

Who is Mendeleev

200

This group is not classified as a metal but as a metalloid

What is the boron group

300

A Greek philosopher who rejected the idea of an atom 

Who is Aristotle

300

Samples of a pure compound always have the same elements in the same mass proportion

What is the Law of Constant Composition

300

Atoms of an element with the same number of protons but different number of neutrons

What is Isotopes

300

The columns of a period table

What is groups

300

This group contains an element that is required for life. All the reactions that occur in your body are controlled by compounds containing this group

What is the carbon group

400

The history of the atom began around this time?

400 B.C.

400

This scientist conducted some experiments with gas tubes and electric currents to learn more about atoms

Who is J.J. Thomson

400

A region of space around the nucleus where electrons are most likely to be found 

What is Orbitals

400

The rows of a periodic table

What is periods

400

This group has elements that are used in fertilizers and explosives. 

What is the Nitrogen group

500

Meaning, uncuttable or indivisible

Atomos

500

New Zealand Physicist who researched the atom and radioactivity. He also names the positive charge in the nucleus. 

Who is Ernest Rutherford

500

Electrons that are in the highest energy level (the energy level farthest from the nucleus) of an atom of an element 

What is Valence electrons

500

The number of elements in a modern periodic table

What is 118 

500

This group has an element most common in the earth's crust and reacts with just about anything to form new compounds.

What is the oxygen group