A simple substance comprised of only one type of atom
What is an element?
100
O, C and N
What are the elemental symbols for oxygen, carbon and nitrogen?
100
these properties allow atoms of different elements to combine into compounds
What are bonds?
100
the amount of a substance that contains the same number of chemical units as the number of atoms in exactly 12 grams of carbon-12
What is a mole (mol)?
100
metallic elements
Which elements conduct electricity best?
200
substances comprised of more than one type of element in fixed proportions
What is a compound?
200
the number of protons on an atom's nucleus
What does the atomic number refer to?
200
a kind of bonding that occurs between and metal and non-metal
What is ionic bonding?
200
the sum of the atomic weights of its constituent atoms
What is molecular weight?
200
special materials, like animal tooth enamel or fired pottery, can store electrons in their matrix, are these kinds of electrical phenomena
What are semiconductors?
300
the smallest particles that retain the unique characteristics of an element.
What is an atom?
300
the total number of protons and neutrons in the nucleus of the atom
What is the mass number?
300
positively and negatively charged ions, respectively
What are cations and anions?
300
the written composition of substances that form molecules
What is a molecular formula?
300
Insulators
What electrical structures contain conduction bands and valence bands separated by a large energy gap?
400
the part of an atom that is a dense cluster of protons and neutrons
What is the nucleus of an atom?
400
potassium, copper, tin, and gold
What elements are represented by the following symbols: K, Cu, Sn, and Au?
400
where atoms share electrons to mutually attain stable electron configurations
What is covalent bonding?
400
H2O
What is the chemical formula for water?
400
Semiconductors
Which electrical structures are comprised of a conduction and valence band separated by a small energy gap?
500
unlike other atoms, which consist of negatively charged electrons surrounding a positively charged nucleus of protons and neutrons, this atom is composed of a single electron and a single proton
What is the hydrogen atom?
500
metal elements
Which group of elements are good conductors of heat and electricity and can be pounded into flat materials?
500
these kinds of bonds cause the boiling point of its associated compounds to be higher than expected
What are hydrogen bonds?
500
the sum of chemical reactions that occur within the cells of an organism
What is metabolism?
500
materials with these electrical properties can be used for trapped electron dating methods