Periodic table/symbol
Hydrogen
What is an electron?
A negatively charged subatomic particle
what is a Bohr model?
Small nucleus that are surrounded by negative electrons moving around the nucleus in orbits.
What is an oxidation number?
Total number of electrons that an atom either gains or loses to form a chemical bond with another atom.
why are ionic compounds harder to break?
electrostatic force
What symbol is He?
Helium
What is a proton?
A positively charged subatomic particle
What are Valence electrons?
Electrons in the outermost shell, or the energy level of an atom
What is the oxidation number for Co2?
+4
do ionic compounds form crystals?
Yes they can
How is the periodic table organized?
In rows called periods, and columns called groups according to increasing atomic number
What is a Lewis dot structure?
Diagrams that describe the chemical bonding between atoms in molecules.
How is the Bohr model used today?
As an introduction to the structure of an atom
How do I determine an oxidation number?
Look at the charge of the element,its equal to that
why are ionic compounds brittle?
due to the strong bond between the positive and negative ions that make up the molecules
How is the state of matter used in the periodic table?
black squares indicate elements that are solids at room temp, those in blue are liquid at room temp and those in red is a gas at room temp
Does it matter where the dots go on the Lewis dot structure?
No, it doesn't matter where they go.
What element has 2 valence electrons?
Helium
What slows oxidation?
why do ionic compounds not melt
because ionic compounds don't have intermolecular forces
How does each state of matter work in the periodic table?
gas vibrate and move freely at high speeds. liquid vibrate, move about and slide past each other. solid vibrate (jiggle) but generally do not move from place to place.
What purpose does the Lewis dot structure serve?
Allows you to know how it will bond and how many bonds it'll form.
How many valence electrons are in oxygen?
six
How do you reduce oxidation numbers?
They reduce half gains electrons and the oxidation number decreases.
formed when 2 nonmetals react with each other