Let's Define
Ionic Bonds
Covalent Bonds
Water and pH
The Solvent of Life
100
The fundamental structural units of matter.
What is an atom.
100
It increases on the Periodic table as you go to the right and up.
What is electronegativity.
100
Covalent bonds form between these.
What is nonmetals and nonmetals.
100
These add hydrogen ions to a solution.
What is an acid.
100
Process in which the hottest molecules leave water as a gas and as a result cools the air.
What is evaporative cooling.
200
A substance that cannot be broken down.
What is an element.
200
A charged atom formed when electrons are transferred.
What is an ion.
200
Bond where the electron is more strongly attracted to the nucleus of one atom, such as what occurs in water.
What is a polar covalent bond.
200
These accept hydrogen ions and remove them from the solution.
What is a base.
200
Prevents water from evaporating.
What is a hydrogen bond.
300
Two or more atoms of same or different elements held together by a bond.
What is a molecule.
300
When an electron is lost in an ionic bond this is the type of charge that results.
What is a positive charge.
300
Electrons are shared equally by both atoms.
What is a nonpolar covalent bond.
300
Going from a pH of 8 to a pH of 6 would be a difference of this many.
What is 100. 10^8 - 10^6 = 10^2 which is 100
300
This allows objects to float on water as long as weight is spread on hydrogen bonds.
What is surface tension.
400
Molecules formed of different types of atoms.
What is a compound.
400
When an electron is gained in an ionic bond this is the type of charge that results.
What is a negative charge.
400
This determines the number of covalent bonds an atom can form. DAILY DOUBLE!
What is the number of electrons needed to fill the outer shell and satisfy the octet rule.
400
As the number of hydrogen ions increases, this decreases.
What is pH.
400
Helps water move/overcome the force of gravity. DAILY DOUBLE!
What is adhesion.
500
The same number of protons, but different number of neutrons. (Hint: Our cells cannot tell one apart from another!)
What is an isotope.
500
Ionic bonds form between these.
What is metals and nonmetals.
500
Anything bonded to itself or elements with similar electronegativity.
What is a nonpolar covalent bond.
500
These help maintain a constant pH in a solution and consist of a weak acid and a weak base.
What is a buffer.
500
The term that refers to heat being released when hydrogen bonds form.
What is high heat of fusion.
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