Atoms & Elements
This subatomic particle has a positive charge.
What is a proton?
Water sticks to itself because of this property.
What is cohesion?
A neutral solution has this pH value.
What is 7?
Carbon has this many valence electrons.
What is four?
What are reactants?The starting substances in a chemical reaction.
What are reactants?
The number of protons in an atom determines this.
What is the atomic number?
Water sticking to another surface is called this.
What is adhesion?
Solutions with a pH below 7 are called these.
What are acids?
What are macromolecules?Large organic molecules found in living things are called these.
What are macromolecules?
The substances formed by a chemical reaction.
What are products?
Atoms of the same element that have different numbers of neutrons are called these.
What are isotopes?
This movement of water through narrow tubes helps plants transport water upward.
What is capillary action?
A substance dissolved in a solution is called this.
What is a solute?
These small units join together to form polymers.
What are monomers?
The energy needed to start a reaction.
What is activation energy?
Carbon-14 differs from Carbon-12 because it has a different number of these particles.
What are neutrons?
Water molecules are considered this because their charges are unevenly distributed.
What is polar?
These substances help prevent sudden changes in pH.
What are buffers?
This macromolecule stores and transmits genetic information.
What are nucleic acids?
Biological catalysts that speed up reactions by lowering activation energy.
What are enzymes?
This Greek philosopher first proposed the idea of atoms.
Who is Democritus?
Approximately this percentage of the human body is water.
What is 60%?
This type of mixture contains undissolved particles that remain mixed throughout the liquid, and blood is an example of one.
What is a suspension?
Name all four major groups of macromolecules.
What are carbohydrates, lipids, proteins, and nucleic acids?
What is the active site?
This part of an enzyme is where substrates bind.