particle that has a neutral charge, found in the nucleus of an atom
Neutron
100
bond formed when electrons are shared
covalent bond
100
Elements found in carbohydrates are:
Carbon, Hydrogen, and Oxygen
100
The energy needed to get a chemical reaction started is called ______ _________.
activation energy
100
Seawater is an example of a _______.
homogeneous mixture of solution
200
negatively charged particle found outside of the nucleus
electron
200
Water has 2 ______ bonds.
covalent
200
Elements found in lipids are ____ and _____.
carbon and hydrogen
200
______ increase the rate of a chemical reaction by lowering the activation energy.
catalysts or enzymes
200
Capillary action is a result of adhesion. What unique property of water is responsible?
hydrogen bonds between molecules
300
Electrons are arranged within ______ ________.
Energy levels
300
A single covalent bond is made of how many electrons?
Two
300
What macromolecule serves as an energy source in humans?
carbohydrates
300
Iron + oxygen yields rust
What is the product?
rust
300
_____ are important in maintaining proper pH of blood.
Buffers
400
Carbon atom can form how many bonds?
Four
400
Atoms that have less than 4 electrons in their outer energy level form _____ bonds.
Ionic
400
What macromolecule stores and transmits genetic information?
nucleic acids (DNA and RNA)
400
Proteins are broken into _______ ________.
amino acids
400
Molecules with uneven distribution of electrons are called ________ molecules.
polar
500
How many outer electrons does sodium have?
One
500
Bonds between molecules such as water are called _____ bonds.
These bonds are formed between slightly positive hydrogen and slightly negative oxygen atoms of water.
Hydrogen
500
Fat that has all the hydrogen atoms that it can possibly hold (it has NO double bonds between the carbon atoms)