Types of Bonds
pH Scale
Major and Trace Elements
General Chemistry
General Chemistry Again
100

This is when Electrons are shared

what is a covalent bond

100

This is a neutral pH

What is a pH of 7

100

These 4 elements are the most common in living organisms 

What is Oxygen (O) , Hydrogen ( H), Nitrogen (N) , and Carbon (C).

100

This is the atomic number

What is the number of protons

100

This is used in PET scans and as other tracers 

What is a radioactive isotopes

200

This is when Electrons are accepted or donated 

What is an Ionic Bond 

200

This is a  solution with more H+ ions

What is an Acid

200

This is a common trace element found in the body

What is zinc, fluoride, or iodine 

200

This is the atomic mass

What is the sum of protons and neutrons 

200

This type of isotope decays 

What is a radioactive isotope 

300

This is the Weakest Chemical Bond 

What is a Hydrogen Bond

300

This is a solution with more OH- ions

What is a Base

300

This is commonly added to water to prevent tooth decay

What is fluoride 

300

This how you find the number of electrons 

What is the same as the number of protons 

300

The tendency of water molecules is due to this 

What is cohesion 

400

In this  type of Bond  shared electrons have a neutral electronegativity.

What is non-polar covalent bond

400

Why acid in the stomach went from a pH to having fewer H+ ions

What was a buffer was added

400

This is commonly added to table salt to prevent the formation of a goiter 

What is iodine 

400

In the equations 2H + O= H20, 2H represents what in the reaction 

What is the reactant 

400

Waters surface tension and heat capacity is due to this 

What is Hydrogen Bonds 

500

In this type of Bond  the electrons have a negative or positive electronegativity. 

What is a polar covalent bond

500

Why Antacids is a buffer for stomach acid

What is because it has a pH higher than 7

500

This is the percentage of the most common elements 

What is 96%

500

In the equations, 2H+0= H2O, the H2O represents what of the reaction. 

What is the product 

500

These move around the nucleus of an atom much like bugs to a bright lamp

What are electrons

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