science exam t2 Flashcards
What is a period?
A period is a horizontal row of the periodic table
what is a group?
A group, in chemistry, a column in the periodic table of the chemical elements
what is an atomic number?
The number of protons in a nucleus
what is an electron shell?
An electron shell is the outside part of an atom around the atomic nucleus.
what is a bohr model?
Bohr’s model consists of a small nucleus (positively charged) surrounded by negative electrons moving around the nucleus in orbits.
what is a valence shell?
The outermost shell or orbital of an atom
what is a ion?
An ion is an atom or group of atoms that has an electric charge
what is a anion?
Anions are negatively charged ions
what is a cation?
Cations are positively charged ions
what is a ionic bond?
An Ionic bond is the bond formed by the complete transfer of valence electron to attain stability
what is a ionic compound?
Ionic compounds are compounds made up of ions that form charged particles when an atom (or group of atoms) gains or loses electrons
what is a covalent compound?
Covalent, or molecular, compounds generally result from two nonmetals reacting with each other
what is a molecule?
Molecules are made up of one or more atoms.
what is a molecular compound?
composed of two or more nonmetal atoms that share electrons with one another in a covalent bond.
what is a diatomic?
Diatomic refers to a molecule that is made up of two atoms of either the same or different elements.
