Classification of Matter
Molecular Theory
Periodic Table
Properties of Elements
Bohr Models
Ionic Compounds
Covalent Compounds
100
Define the difference between a heterogenous and homogenous mixture. Mention the distribution of particles.
Heterogenous: Particles are not evenly distributed
Homogenous: Particles are evenly distributed
100
The difference between atoms and ions is . . .
That atoms are neutral and ions are positively or negatively charged
100
Groups and families: Which are rows and which are columns?
Groups: Columns
Rows: Families
100
An element has 12 protons. Which element is it?
Magnesium
100
The respective number of electrons that can be contained within the first, second and third energy levels
2, 8, 8
100
Ionic compounds are a combination of a positive ____________ and a negative ______________
Metal, nonmetal
100
Give the compound name of this formula: P6Cl4
Hexaphosphorus tetrachloride
200
Define the difference between the two kinds of pure substance
Elements are made up of same atoms
Compounds are made up of same particles which consist of a few atoms in a fixed ratio
200
A positively charged ion is called a ________________ and a negatively charged ion is called a ________________
Cation, anion
200
Find the chemical symbol, atomic number and atomic mass of Rhodium respectively. Round all numbers.
Rh, 45, 103
200
An element has 8 protons, 6 neutrons and 12 electrons. Its atomic mass is . . .
Atomic mass = 14
200
What element does this Bohr model represent?
Phosphorus
200
T or F: The compound name for OsCl4 is Osmium tetrachloride if the charge of Osmium is 4+
False, that is not how ionic compounds are written. The correct compound name is Osmium (IV) chloride.
200
Give the formula of this compound name: Nonasilicon trioxide
Si9O3
300
When a mixture does not mix well and settles into distinct phases, it is called a/an _______________. Give an example.
Mechanical mixture (water and sand or oil, etc.)
300
The atomic number is equal to ________________
# of protons
300
Name 6 of the noble gases
Helium, neon, argon, krypton, xenon, radon (and oganesson)
300
Why are noble gases non-reactive?
They have full valence shells so they are stable
300
What is the charge of this atom/ion?
Neutral, no charge
300
Give the formula of this compound name: Potassium nitride
K3N
300
Give the formula for diarsenic trioxide
As2O3
400
What is a suspension?
The particles blend fairly well and appear homogenous when mixed, but will always settle back into distinct phases
400
The atomic mass is equal to ________________
# of protons + #of neutrons
400
Of the alkali metals, which is the most reactive?
Francium
400
An element has 8 protons, 7 neutrons and 10 electrons. What is its charge?
-2
400
How many electrons would be in the (hypothetical) valence shell of aluminum (III)?
10 electrons total, so 8 valence electrons
400
Give the formula of this compound name: Barium phosphide
Ba3P2
400
Give the compound name for the formula K2CrO4
Potassium chromate
500
An element is a semiconductor used in your phone. What group of elements does it belong to?
Metalloids
500
The outermost energy level is the ________________ and contains ________________
Valence shell, valence electrons
500
What kind of elements are found along the staircase? Name three elements that belong to this grouping.
Metalloids: Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Polonium, Astatine
500
The charge of an element is +7. It has 23 protons. How many electrons does it have?
16 electrons
500
Neutrons = 126
Electrons = 83
Atomic mass = 209
How many protons?
83 protons
500
Sulfur (II) and Scandium (III) form a compound. What is its formula and name?
Scandium sulfide, Sc2S3
500
Write the chemical formula for chromium (III) permanganate
Cr(MnO4)3