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