Unit 0
Flammable materials, like alcohol, should never be dispensed or used near ....
What is an open flame?
In 1911, this scientist discovered the nucleus of an atom by observing the deflection of alpha particles in his famous gold foil experiment.
Who is Ernest Rutherford?
The 5th element in the Halogens group.
What is Astatine?
This type of bond typically results in compounds that have high melting and boiling points, conduct electricity when dissolved in water, form crystalline structures and a transfer of electrons.
What is an ionic bond?
This molecular geometry, characterized by a central atom bonded to two other atoms and having one lone pair, results in a shape with an angle of 120o.
What is bent?
This notation is used to express very large or very small numbers as a product of a number between 1 and 10 with a power of 10.
What is scientific notation?
This part of an atom has a positive charge and resides in the nucleus, contributing to the atom's mass.
What is a proton?
This is what the atomic radius trend does as you move from left to right on the periodic table.
What is decreases?
This type of bond occurs when two atoms share one pair of electrons, resulting in a bond represented by a line in a lewis structure.
What is a single bond?
This polyatomic ion, consisting of one sulfur atom and four oxygen atoms, has a charge of -2.
What is Sulfate (SO42-)?
This step of the scientific method involves analyzing data to determine if it supports the original hypothesis, often leading to new questions or experiments.
What is the conclusion/drawing a conclusion?
These atoms of the same element have the same number of protons but differ in the number of neutrons giving them different atomic masses.
What are isotopes?
This scientist is credited with creating the first version of the periodic table, arranging elements by increasing atomic mass and properties.
Who is Dmitri Mendeleev?
This term describes a molecule that has regions of partial positive and partial negative charge due to uneven distribution of electrons, often seen in water.
What is a polar molecule?
This element is in a family by itself.
What is Hydrogen?
The ability to get the same measurement three times in a row is called ...
What is Precision?
This rules states that electrons fill the lowest available energy orbitals first, shaping the arrangement of electrons in an atom.
What is Aufbau's principle?
This element, found in Group 14 of the periodic table, has four valence electrons and is essential for organic life.
What is carbon?
This type of intermolecular force, arising from temporary dipoles in nonpolar molecules, is the weakest of the intermolecular interactions and increases with molecular size.
What are London Dispersion forces?
This element has an electron configuration that ends with 4s2 3d6 and is widely known for its use in construction and manufacturing.
What is Iron (Fe)?
When rounding to this many significant figures, the number 0.003478 becomes 0.00348.
What is three significant figures?
The following electron configuration belongs to ....
[Xe] 6s2 4f14 5d10 6p2
What is Lead?
This trend describes the increase in energy as you move across a period from left to right, primarily due to the increasing nuclear charge and decreasing atomic radius.
What is ionization energy?
This compound, commonly used in fertilizers and explosives, is known by its systematic name and has the formula NH4NO3.
What is Ammonium Nitrate?
This compound, often used as a disinfectant and antiseptic, is commonly known by its systematic name and has the formula NaClO.
What is sodium hypochlorite?