Atomic Theory
This subatomic particle has no electric charge and is found in the nucleus.[1]
Answer: What is a neutron
The charge on this type of ion is written with a plus sign after the number, such as 2+.[1]
Answer: What is a positive ion (cation)
The symbol “Fe” stands for this strong metal often mixed with carbon to make steel.[1]
Answer: What is iron
Non-metallic elements that are very unreactive, such as neon and argon, are called this family.[1]
Answer: What are noble gases
Chlorine combined with sodium forms this common, edible compound.[1]
Answer: What is table salt (sodium chloride)
This subatomic particle has a negative electric charge and is found in energy shells.[1]
Answer: What is an electron
The charge on this type of ion is written with a minus sign after the number, such as 2–.[1]
Answer: What is a negative ion (anion)?
The symbol “Hg” comes from “hydrargyrum” and stands for this liquid metal.[1]
Answer: What is mercury?
Lithium belongs to this highly reactive family of metals.[1]
Answer: What are alkali metals
Silver contacts in computer keyboards help ensure this type of reliable flow when keys are pressed.[1]
Answer: What is electrical conduction?
Protons and neutrons cluster together to form this part of the atom.[1]
Answer: What is the nucleus
This quantity for an element on the periodic table is usually a decimal and reflects the average of all isotopes.[1]
Answer: What is the average atomic mass?
The symbol “Ag” comes from “argentum” and stands for this precious metal used in coins and cutlery.[1]
Answer: What is silver?
Beryllium belongs to this group of fairly reactive metals.[1]
Answer: What are alkaline earth metals
Mercury vapour is particularly dangerous because it is this.[1]
Answer: What is highly toxic?
All atoms are made up of these three subatomic particles.[1]
Answer: What are protons, neutrons, and electrons
Atoms of the same element that have different numbers of neutrons are called this.[1]
Answer: What are isotopes
The symbol “Au” comes from “aurum” and stands for this precious yellow metal.[1]
Answer: What is gold?
Helium belongs to this very unreactive family.[1]
Answer: What are noble gases
This element is the second most common in Earth’s crust and forms minerals such as quartz and opal with oxygen.[1]
Answer: What is silicon
In an atom, most of the mass is concentrated in this region.[1]
Answer: What is the nucleus?
For hydrogen-1, the mass number is 1 and there are no neutrons; changing to hydrogen-2 changes only this.[1]
What is the number of neutrons
The symbol “Si” stands for this brittle, grey metalloid used in computer chips.[1]
Answer: What is silicon
Fluorine belongs to this family of non-metals that are strongly reactive.[1]
Answer: What are halogens
Silver’s high reflectivity and thermal conductivity make it useful in this type of musical instrument.[1]
Answer: What is a flute (or silver flute)