Does it matter
How we measure
Atoms
Ions
Where light dares
100

Something that makes up the world and us.

What is matter?

100

This law explains why CO and CO₂ aren’t just two versions of the same “flavor,” but entirely different molecules.

The law of multiple proportions.

100

The number of protons in the nucleus.

What is the atomic number.

100

A negatively charged atom.

What is an anion.

100

The wave nature of light was established by this experiment.

What is a double slit experiment?

200

The state in which molecules move extremely quickly and by bouncing off each other. 

What is gas.

200

Water from a glacier, a swamp, or your kitchen tap all follow the same strict recipe: hydrogen and oxygen show up in the exact same mass ratio every time. This law is the reason the universe enforces such polite consistency.

The law of definite proportions.

200

The subatomic particle that helps stabilize the nucleus and, when its number changes, can create different isotopes of the same element.

What is the Neutron.

200

Sodium loses one electron readily.

What is to attain a lower energy state.

200

Each point on the existing wavefront can be considered to act as a source of waves when passing through a narrow opening.

What are secondary wavelets?

300

An unusual state of matter found in Neon signs.

What is Plasma.

300

When 7.7 grams of shiny sodium meet 11.9 grams of chlorine gas, they form exactly 19.6 grams of table salt. This fundamental law explains why nothing mysteriously vanishes (or appears) during a chemical reaction.

What is the law of conservation of mass?

300

The subatomic particle with a charge equal but opposite to the proton.

What is an electron.

300

According to periodic trends, group 7A elements readily accept this.

What is one electron.

300

The easily measured difference in Red part of the spectrum and the blue part of the spectrum.

What is the heat energy or the temperature.

400

A solid with regularly repeating pattern of anions and cations.

What is an ionic solid, or a crystalline solid?

400

Hydrogen and oxygen make two different molecules, one with 5.93 grams of hydrogen, the other with 11.20 grams. The neat, simple ratio between these masses reveals this law, which says an element can pair with fixed masses of another element only in small whole-number proportions.

What is the law of multiple proportions.

400

The heaviest subatomic particle.

What is a neutron with a mass of 1.6749275x10^-24 g

400

In a chemical reaction Cesium and Rubidium lose one electron each and resemble a noble gas.

What are Xenon and Krypton.

400
The deviation of waves propagating in a straight line when they encounter an obstacle or pass through an aperture.

What is diffraction.

500

The temperature at which the motion of particles theoretically stops.

What is 0 K?

500

Significant figures in your density measurement of an aluminium bar = 0.27 x101 g/cm3.

What is 2?

500

Because this force could pass through a vacuum, scientists realized atom wasn’t indivisible, hinting that the atom itself contained empty space and could be subdivided.

What is an electrical discharge in a cathode ray tube.

500

The noble gas Se resembles when it is ionized.

What is Krypton.

500

The redirection of a wave as it passes from one medium to the other.

What is refraction.

600

In water all molecules are constantly doing this.

What is constantly moving?

600

(4.4 x 107)/(2.25 x 105) =?

What is 2.0 x 10?

600

True or False: Only a very small fraction of alpha particles deflected at greater than 900 angle due to possible concentration of electrostatic force in the Rutherford gold foil experiment.

What is true.

600

These two forms of an element differ from the neutral atom: one by having a different number of neutrons, the other by gaining or losing electrons.

What are isotopes and ions.

600

The frequency of a laser at a rock concert emitting green light with a wavelength = 512 nm.

What is 5.8 x 10^14 s-1