Atomic Chemistry
How many protons, neutrons, and electrons are in Germanium-72?
32 protons, 40 neutrons, and 32 electrons
What charge does a sulfur ion have?
-2
What do the dots represent in a Lewis Dot structure (be specific)?
Valence electrons
What is the small molecule shape of H2O?
Bent
What is the defining characteristic of an element, that when it is changed, the identity of the element is changed?
protons
What element has the electron configuration [Ar]4s23d5?
Manganese
When ions bond, what is the total charge of the compound?
How many covalent bonds can fluorine make?
What is the small molecule shape of CO2
Linear
Why does the 4s subshell get filled before the 3d?
Atoms want full shells and subshells. It takes less energy to fill the 4s subshell since it only holds 2 electrons. This is why it is filled first.
What ELEMENT is created by the beta decay of nitrogen?
Oxygen
In the compound magnesium iodide, identify the cation.
Mg2+
What is incorrect about the following drawing?
H H
| |
H - C = C - N - H
The nitrogen atom is only making 2 bonds, it should be making 3.
What is the shape of a molecule whose central atom has 3 bonding pairs of electrons and 1 lone pair of electrons?
Pyramidal
What "need" is being satisfied when atoms bond?
Fill the valence shell with 8 electrons.
An isotope has a half life of 10 days. If you start with a 40g sample, how much is left after 30 days?
5 grams
Write the name and formula of the compound formed when an aluminum ion and an oxygen ion combine.
Aluminum oxide
Al2O3
How many total valence electrons are shared in a triple bond?
6 electrons shared
What does the electron domain theory state?
Electron pairs move so that they are as far away from each other as possible.
Why does magnesium lose 2 electrons instead of adding 6 electrons when it becomes an ion?
It requires less energy to get the desired full valence shell.
What is the daughter isotope when Europium-154 undergoes alpha decay?
Promethium-150
Write the formula of the compound formed when a sodium ion and a carbonate ion (CO32-) combine.
Na2CO3
How many total lone pairs are in the molecule hydroxidochlorine, HOCl?
5 total lone pairs
What small molecule shapes are in CH4S?
tetrahedral, bent
Why do nonmetals make covalent bonds with other nonmetals?
Because nonmetals have a tendency to add electrons and do not want to give them away. So in order to bond nonmetals must SHARE electrons. That is why they make a covalent bond.