atoms -madison easley Flashcards
(28 cards)
What is a proton?
Particle that had positive charges
What is a nucleus?
Middle part made up of protons and neutrons
What is a neutron?
A particle that has no charge.
What is a electron?
A particle that has negative charge.
What is a orbital?
An atoms where there is a high probability of findings electrons
What is a valence electron?
Electron that is found in the outermost she’ll of an atom and atoms chemical properties.
What is periodic law?
The law that states the repeating chemical
What is a period?
A horizontal row of elements
What is a group?
A vertical column of elements
What is a metal?
An e,went that is shiny and conducts heat
What is a nonmetal?
An element that conducts heat and electricity poorly.
What is a semiconductor?
An element or compound that conducts electric current better than an insulator but not as well as a conductor does.
What is a alkali metal?
One of the elements of group one of the periodic table.
What is a alkaline earth metal?
One of the elements of group two
What is the transition metal?
One of the element of group 3-12
What is a halogens?
One of the elements of group 17
What is noble gases?
An I reactive element of group 18
What is a ion?
An atom or group of atoms that has lost or gained one or more electrons and has a negative or positive charge.
What is an atomic number?
The number of protons in the nucleus
What is the mass number?
The sum of the number of protons and neutrons in the nucleus
What is isotopes?
An atom that has the same number of protons as other atoms of the same element do but that has a different number of neutrons
What is atomic mass unit?
A unit of mass that describes the mass of an atom or molecule
What is average atomic mass?
The weighted average of the masses of all naturally occurring isopes of element.
What is a mole?
The si unit used to measure the amount of substance whose number of particles is the same as the number of atoms of carbon in 12 g of carbon-12
