Matter's Building Blocks
This dense region of particles that is largely responsible for the mass of an atom usually contains particles with a positive charge and no charge.
What is the Nucleus?
Coal, graphite (pencil lead), and diamonds all consist of it.
What is Carbon?
The Greek prefix used to designate four atoms of a specific element present in a molecular compound.
What is Tetra-?
On the periodic table, the halogens are located to the left of this group of gases.
What are the Noble (Inert) Gases?
The exothermic process that produces a liquid from a gas.
What is Condensation?
The number of protons in every atom of a particular element which determines the identity of each element.
What is the Atomic Number?
Used in rechargeable batteries and to protect other metals from corrosion, its symbol is Cd.
What is Cadmium?
These are groups of atoms with an overall net charge; cyanide and permanganate are examples.
What are Polyatomic Ions?
This group of metals is very reactive and lose one electron when forming compounds.
What are the Alkali Metals?
This is Avogadro’s Number, the number of particles in a mole.
What is 6.022 × 1023?
These particles are equal in number for every atom of an element but they are opposite in charge.
What are Protons and Electrons?
Plumbum in Latin, Ancient Rome's plumbing was made of this heavy metal.
What is Lead?
The molecule containing three bromine atoms and eight oxygen atoms has this name.
What is Tribromine Octoxide?
These are the columns of the periodic table which illustrate the elements with similar outer electron configurations, and, therefore, similar properties.
What are Groups (Families)?
These are located in an atom's outermost shell or energy level. They are most easily lost or shared and are responsible for chemical bonding.
What are Valence Electrons?
It's one or two or more atoms of the same element that differ in mass.
What is an Isotope?
This element exists as a diatomic molecule in nature and is a poisonous gas that combines with sodium to form table salt.
What is Chlorine?
This is the chemical formula for the compound formed from lithium and sulfate ions.
What is Li2SO4?
The s- and p-block elements consist of metals, metalloids, and nonmetals. These elements are also collectively called this.
What are Main Group (Representative) Elements?
For the reaction that produces ammonia, 3 H2 + N2 → 2 NH3, when 6 moles of NH3 are produced, this number of moles of hydrogen reacted.
What is 9?
This is the number of neutrons in the nucleus of a 56Fe2+ ion.
What is 30?
After oxygen, this element associated with computer chips is the most common in Earth's crust.
What is Silicon?
Roman numerals are used to state this when naming ionic compounds that contain a transition metal that forms more than one type of ion.
What is the Charge on the Metal (Cation)?
He was a Russian chemist and professor who first published this chart in 1869. His arrangement of the then-known elements contained gaps, allowing him to predict the existence and properties of some elements that were yet undiscovered.
Who was Dmitri Mendeleev?
Given the reaction 2 Mg + O2 → 2 MgO, 10 g of Mg can produce 16.6 g of MgO while 7 g of O2 can produce 17.6 g of MgO. From this information, Mg is this.
What is the Limiting Reactant (Reagent)?