Atoms
Matter that can’t be subdivided any further
What is an atom?
This involves the forming and breaking of chemical bonds (includes reactants and products)
What is a chemical reaction?
This makes it possible for the fishing spider to walk on water
What is cohesion (of water)?
pH 7
What is water's pH? (Neutral pH)
Scheme where all elements are arranged in the order of their atomic number
What is the periodic table?
Particles in an atom that have a positive electrical charge
What are protons?
When two atoms share electrons
What is a covalent bond?
It takes a lot of energy to change the temperature of water because of this property
What is water’s large heat capacity? (Hydrogen bonds)
Any fluid with a pH below 7.0
What is an acid?
Orbits that electrons follow around the nucleus
What are electron shells?
Number of protons and element has
What is atomic number?
When two oppositely charged ions attract each other
What is an ionic bond?
This feature of water causes lakes and other bodies of water to freeze from the top down
What is water’s low density as a solid? (Ice floats)
Any fluid with a pH above 7.0
What is a base?
This element makes up 65% of your body mass
What is oxygen?
The combined mass of protons and neutrons (protons + neutrons)
What is atomic mass?
Weak bond between molecules (not between atoms)
What is a hydrogen bond?
Each molecule is V-shaped, polar, and it forms hydrogen bonds with other molecules of its kind
What is a water molecule?
Example of a common basic substance (pH of 9)
What is baking soda?
This electron shell has a capacity of 8 electrons
What is the second electron shell?
Atoms with the same number of protons but different numbers of neutrons
What are isotopes?
This type of bond is responsible for many of the unique characteristics that make water one of the most important molecules for life
What is a hydrogen bond?
This property of water allows it to dissolve table salt
What is a polar molecule? (Good solvent)
These are chemicals that resist changes in pH level
What are buffers?
An atom that is positively or negatively charged
What is an ion?