Measurement
Refers to how close a measurement is to the true value.
What is accuracy?
This group(s) are known for their stable/unreactive nature
What is group 18 (Noble gases)?
The number of protons gives us this value, which is unique for each element and determines its identity.
What is the atomic number?
These are outer-shell electrons
What are valence electrons?
This type of bond involves sharing electrons.
What is a covalent bond?
Accuracy or Precision?
This is limited by random errors. It may usually be determined by repeating the measurements.
What is Precision?
Before IUPAC, this group was know by many names:
- the "pnictogens" from Ancient Greek: πνῑ́γω "to choke" and -gen (to create).
- Group Va, Vb(for their pentavalency) and Pentels .
The main feature of this group is 5 valence electrons, and a general electron configuration of s2p3
What is group 15?
This is why the atomic mass listed on the periodic table is not a whole number.
What is because it is the weighted average of all of the masses of the isotopes of a given element?
The two sub-atomic particles that make up the nucleus.
What are protons & neutrons?
This type of bond overlap is the strongest type of covalent chemical bond. They are formed by head-on overlapping between atomic orbitals along the internuclear axis.
Hint: Unfortunately, the Skibidi children have desecrated the word.
What is a sigma bond?
[Mr. Wong Sponsored, Daily Triple]
A stone falls from rest to the bottom of a water well of depth d.
The time t taken to fall is 2.0 ±0.2 s. The depth of the well is 1 2 calculated to be 20 m using d = a*t . The uncertainty in a is negligible.
What is the ABSOLUTE uncertainty in D?
What is +/- 4m?
What is group 1?
What is the A,Z and Q of Uranium-235
What is A=235, Z= 92 and Q =0
This particle is 1/1837 the a mass of a proton
What is an electron?
What is the geometry of AX2E4?
What is Octahedral?
What type of error is associated with students leaving and entering the room as you measure the mass of a solid with an analytical balance.
What is random error?
Which of the following properties does lithium have a larger value than potassium; Ionization Energy, Atomic Radius, Electronegativity, or Ionic Radius?
What is ionization energy and electronegativity?
An atom with the same number of protons but different number of neutrons.
What is an isotope?
electron configuration of Palladium (Core notation is fine)
What is [Kr] 5s2 4d8 ?
Monosodium glutamate (MSG), C5H8NO4Na, is widely used as a flavour enhancer in the food industry.
This compound was first produced by the Japanese chemist Kikunae Ikeda in 1908. At room temperature, MSG exists as a white crystalline solid.
What type(s) of bond is found in MSG?
What is Ionic?
What is a common systematic error when measuring the mass of something?
What is improper/non calibrated scales?
Which group will feature a large increase in ionization energy from the 4th to 5th successive ionization?
[WONG DAILY DOULBE]
Calculate the average atomic mass for silicon based on the percent abundances of its naturally occurring isotopes: Si-28: 98% Si-29: 1.5% Si-30: 0.5%
What is 28.03
When excited with energy, a Hydrogen atom emits light with λ=1.215×10−07m. What colour is this light?
What is UV/Ultraviolet?
Lavoisier suggested "azote" from Greek ἀζωτικός meaning "no life" because it is an asphyxiant gas.Its name also comes from the Greek πνίγειν meaning "to choke."
This low melting point, diatomic gas possesses a sp hybridized orbital. It has a triple bond.
What is Nitrogen?