Atomic structure
This model of the atom shows electrons follow clear orbits that are shown as circles around the nucleus.
What is Bohr's model
when these are found in the shells closest to the nucleus they have the lowest energy
What are electrons
This characteristic of a substance can only be observed as it is undergoing a change to become an entirely different kind of matter, such as when iron rusts or wood burns.
What is a chemical property
These Group 1 elements are so soft they can be cut with a knife and are highly reactive, especially with water.
What is an alkali metal
This non-metal element is found in diamonds, coal, and your pencil.
What is carbon
This subatomic particle has a mass of 1/1836 relative to a proton.
What is an electron
The pull between oppositely charged objects.
This term describes the percentage of a particular naturally occurring form of an element found on a planet, a figure that is used to calculate the element's average atomic mass on the periodic table.
What is isotope abundance
According to the IUPAC definition, an element in the d-block that has a partially filled d subshell in its atomic state or a stable ion is one of these
What is a transition metal
This non-metal makes up over three-fourths of the Earth's atmosphere.
What is nitrogen
The total number of protons added together with the total number of neutrons.
What is atomic mass number.
The negatively charged particles located in the outermost electron shell of an atom
What is a valence electron
An unstable form of an element, such as carbon-14 or iodine-131, whose nucleus emits radiation as it undergoes a process called radioactive decay to become more stable.
What is a radioisotope
This lightweight, silvery-white metal is the third most abundant element in the Earth's crust. Its name's spelling is a point of contention between American English speakers and those in the UK, where an extra "i" is included.
What is aluminium
At room temperature, this halogen is the only non-metal that is a liquid.
What is bromine
An atom that has more protons than electrons in it's structure
What is a cation.
Of the four basic atomic orbital types, this one is the only one with a perfectly spherical shape and is the first to be filled in any electron shell.
What is an s electron subshell
This dimensionless quantity, often found on the periodic table, represents the weighted average mass of an element's atoms compared to 1/12th the mass of a carbon-12 atom, accounting for the natural abundance of its various isotopes.
What is relative atomic mass
This element, a transition metal is precious and derives its symbol from its Latin name, aurum. It has one of the highest values for heat and electrical conductivity among all metals and is known for not reacting with most acids.
This element is found in ozone, the gas that helps protect the Earth from the sun's UV radiation.
What is oxygen
Variants of a particular chemical element that have the same number of protons in their atomic nuclei, but different numbers of neutrons.
What is an isotope
This element has the electron configuration:
1s2 2s2 2p6 3s2 3p6 4s1 3d5
What is Chromium
This analytical instrument works by ionizing samples and then separating the resulting charged particles based on their mass-to-charge ratio (m/z) to identify unknown compounds or determine isotopic abundance
Though more abundant in the Earth's crust than gold, this metal, often used in catalytic converters, is generally more expensive to mine and process.
What is platinum
This non-metal is commonly found in matches, rubber bands, and tires and is known for its "rotten egg" smell.
What is sulfur