Atomic Structure
Elements
Properties
Molecules
Great Scientists
100

This particle of the atom always has a positive charge.

Protons

100

This element is the only atom that does not have two electrons in its inside shell. 

Hydrogen

100

This property involves an element's ability to conduct moving electrons. 

Conductivity

100

Whenever two or more atoms are bonded together, they are called this. 

Molecules or Compounds

100

This science teacher developed the Periodic Table when he was writing a chemistry book in his own language. 

Dmitri Mendeleev

200

This particle of the atom, located at the Nucleus, has no magnetic charge. 

Neutrons

200

Elements in the Periodic Table can be classified into these THREE BASIC TYPES.

Metals, Non-Metals, Metalloids

200

The property of Malleability, the ability to be pounded into shapes, is a characteristic of this type of element. 

Metals. 

200

The formula for this electrically conductive molecule represents the ionic bond between Chlorine and Sodium.

NaCl

200

This college student who was bored at home during a lockdown developed a higher level of math - Calculus. This allowed him to eventually discover the Laws of Motion and Gravity. 

Isaac Newton

300

These particles of an atom, which orbit the Nucleus, always have a Negative charge.  

Electrons

300

The "Atomic Number" at the top of an element's entry in the Periodic Table refers to this unique characteristic about each element.

The number of Protons.

300

Mercury, a liquid at room temperature, undergoes this when it reaches 674.1 degrees Fahrenheit.

Boiling Point

300

This kind of molecular bond happens when a Non-Metal atom 'steals' an electron from a Metal atom. 

Ion or Ionic Bond

300

This scientist worked his way through college cleaning the rooms of his classmates. He became famous when he used his new microscope to write and illustrate a book that revealed the microscopic world. 

Robert Hooke

400

Electrons, having a Negative charge orbit the protons in different 'Energy Levels' called this. 

Electron Shells

400

The "Periods" in the Periodic Table indicate this about each element in its row.

The number of Electron Shells. 

400

Gallium, a "poor metal," reaches this at just 85 degrees Fahrenheit. 

Melting Point

400

Water, consisting of one Oxygen atom bonding with the electrons of two Hydrogen atoms is a great example of this kind of molecular bond.

Covalent Bond

400

This astronomer used the new telescopes and mathematics to disprove the commonly held idea that the Universe revolved around Earth. 

Nicolaus Copernicus

500

The term "Atomos" was used by this ancient scientist who was the first to think of matter as being made up of tiny "uncuttable" parts. 

Democritus

500

The Atomic Mass number of an Element is literally the weight of that Element's atoms measured in this unit named after this scientist who discovered that atoms exist.

John Dalton

500

This metalloid element has just enough electrical conductivity that it can be used to make computer processors. 

Silicon

500

With Metallic Bonds, the metal atoms freely exchange electrons back and forth between each other resulting in a constant flow of electrons called this.

Sea of Electrons

500

King Charles II insisted that this college dropout be given his Master's Degree for undertaking the huge task of mapping all of the visible stars in the Southern Hemisphere.

Edmond Halley