Unit 3 Vocab
The modern definition of an element is a substance made up of atoms that all have the same number of
protons
number of neutrons
the difference between atomic mass and atomic number. (atomic mass number) - (atomic number)
Salts have which of the following properties?
transparent ionic bonds combination of metal and nonmetal atoms
Rank the following according to least strong to most strong
1. dipole-dipole interactions 2. hydrogen bonding 3. dispersion (van der Waals) forces 4. covalent bonding (correct)
Rank the following types of energy according from most ordered to least ordered.
1. kinetic energy 2. nuclear potential energy 3. electrical potential energy 4. chemical potential energy 5. thermal energy ALL CORRECT
Which ion would Ca most likely form?
Ca2+
True or False? High melting and boiling temperatures indicate weak forces holding the molecules together.
False
combines small nuclei to make larger ones
fusion
fuel for the process is relatively plentiful on earth
fusion
occurs on the sun
fusion
primary process in the most powerful nuclear weapons
fusion
Which of the following types of fatty acids are good (or neutral) for the human body?
monounsaturated fatty acids, polyunsaturated fatty acids
The mass of a proton is ___________ the mass of an electron.
much greater than
What does half-life mean?
The time it takes for half of all the nuclei to decay.
Metals have which of the following properties?
Metals are good electrical conductors. Metals are shiny. Metals are malleable. Metals easily form alloys.
Beta decay
One of the neutrons emits an electron and turns into a proton.
ionic bond
The bond between a metal and a nonmetal
metallic bond
The bond between two metal atoms
covalent bond
The bond between two nonmetal atoms
Gamma decay
The nucleus emits a high energy photon. Neither the atomic mass nor the atomic number change.
The energy required for a reaction to take place is known as the _______________.
activation energy
A proton has a mass that is ______________ than the mass of a neutron.
approximately equal to
number of protons
atomic number
has been harnessed for commercial electricity generation
fission
involves breaking up large nuclei into smaller ones
fission
