Foundations & Atoms
The three main subatomic particles found inside an atom.
What are protons, neutrons, and electrons?
Represented by He4/2 in a nuclear equation
What is an alpha particle?
The common family group name for the highly unreactive, stable elements located in Group 18.
What are Noble Gases?
The standard chemical name for the binary ionic compound with the formula NaCl
What is Sodium chloride ?
The number of significant figures present in the precise measurement 0.0520 grams.
What is three?
He discovered the dense, positive nucleus using his Gold Foil Experiment.
Who is Ernest Rutherford?
This high-energy electromagnetic emission has no mass and zero electrical charge.
What is a gamma ray?
The full, ground-state electron configuration of an Oxygen atom.
What is 1s^2 2s^2 2p^4?
The chemical formula for the binary covalent compound dinitrogen tetroxide.
what is N2O4?
The value in meters when converting 4.5 kilometers into standard metric base units.
What is 4,500 meters?
Atoms of the same element that share the same number of protons but differ in neutron counts.
What are isotopes?
The final amount remaining of a 40.0 g sample after it undergoes 3 complete half-lives.
What is 5.0 grams?
The element that possesses the Noble Gas shorthand configuration [Ne] 3s^2 3p^3
What is Phosphorus (P)?
The balanced chemical formula for aluminum sulfide
What is Al2S3?
The numerical value equal to exactly 1 mole of any molecular chemical substance.
What is 6.02 x 10^23 ?
The total number of electrons present inside a neutral atom containing 16 protons.
What is 16?
The missing product nucleus in this alpha decay equation: 239/94 Pu --> 4/2He+ ____________
What is Uranium-235 (235/92 U)
The unique class designation for elements like Antimony (Sb) that border the diagonal staircase line.
What are metalloids?
The chemical formula for nitrous acid
What is HNO2?
How many grams are in 3.00 moles of CO2?
What is 132.03 grams?
The term used to describe the calculated average mass of an element based on its natural isotopic abundance ratios.
What is average atomic mass?
The half-life of an isotope if an 80 mg sample decays down to exactly 5 mg over a time span of 36 seconds.
What is 9 seconds?
The correct element identity matching the full electron configuration 1s^2 2s^2 2p^6 3s^1
What is Sodium (Na)?
The chemical formula for aluminum hydroxide
What is Al(OH)3
How many moles are in 200.18 grams of CaCO3?
What is 2.00 moles?