1st 9 Weeks Review
This family of elements, found in Group 1 of the periodic table, is known for being highly reactive and includes elements like sodium and potassium.
What are alkali metals?
What is the proper name for the compound N2O?
What is Di-nitrogen monoxide
Which formula represents a tetrahedral molecule?
A) CH4
B) CaCl2
C) HBr
D) Br2
What is CH4
What does it mean to balance a chemical equation?
What is all elements are the same amount on both sides of a reaction.
What is the mass of one mole of O in grams?
What is 16 grams!
John Dalton proposed that that all atoms of a given element are identical in mass and properties, however, he was proven wrong. What drawback disproved his statement?
What is the discovery of the isotopes with different masses (number of protons and neutrons)?
The correct formula for sodium oxide is:
A) SO2
B)S2O
C) NaO2
D) Na2O
What is Na2O
Which compound represent a bent molecule?
A) BH3
B) K2S
C) H2O
D) HF
What do you call the left side of a formula? (raw materials)
What is the total number of molecules of one mole of CO2?
What is 6.02 x 1023 molecules
In the electromagnetic spectrum, as the frequency of radiation increases, the wavelength _________, and the energy _________, as described by the equation E=h⋅f
The wavelength decreases and the energy increases.
What is the correct formula for NH4NO2?
A) ammonia nitrite
B) ammonium nitrite
C) ammonia nitrate
D) ammonium nitrate
What is B) ammonium nitrite
What kind of compounds share electrons?
What is covalent compounds.
What is the law called that is used for balancing equation?
What is the law of conservation of mass.
What are the two things a mole can be converted into?
What is avogadros number (6.02 x 1023) and the mass of the element/compound!
An element has three isotopes: Isotope A (mass = 14.1 amu, abundance = 50%), Isotope B (mass = 15.0 amu, abundance = 30%), and Isotope C (mass = 16.0 amu, abundance = 20%). Calculate the average atomic mass and identify the element on the periodic table.
The atomic mass is 14.75 amu, which is closest to Nitrogen
What is the correct formula for Potassium Hydride
What is KH!
How many electrons are shared in a triple bond?
What is 6 electrons.
Explain double replacement reaction in your own words.
What is when an element or elements from both compounds swap after the reaction and create new and different products.
What is a mole? Why is it important?
A mole is a unit of measurement in chemistry and it is important because atoms are SUPER small; hence, needing a large number to represent it (Avogadro's Number)
Given the electron configuration [Kr]5s24d105p5, identify the element, its atomic number, and explain how you determined the number of valence electrons using the electron configuration only!
Iodine (I), the atomic number is 53, and the valence electrons are from the highest energy level 5s and 5p, so adding those up is 2 + 5 = 7.
What is the correct formula for Nitrogen(II)Oxide? (simplified)
What is NO2
Describe VSPER theory.
The valence shell electron pair repulsion (VSEPR) theory is a model used to predict 3-D molecular geometry based on the number of valence shell electron bond pairs among the atoms in a molecule or ion.
What are the last two elements (if other elements are present) that should be balanced when balancing equations?
What is Oxygen (O) and Hydrogen (H)!
How would you convert between molecules and grams of a molecule?
What is using the mold to convert from molecules to mole using (6.02 x 10^23) and then converting from mole to grams using the weight of the element or compound.