The distance between the center of the nucleus of an ion and the outermost electrons?
ionic size
100
What are periodic trends?
Periodic trends: Regular variation of properties of an element with increasing atomic number.
100
The electrostatic attraction between positively charged nuclei and negatively charged electrons permits two atoms to be held together by a ?
chemical bond
100
Why is the VSEPR theory used to classify molecules?
Because it refers to the repulsion of electrons.
100
What is the significance of a chemical formula?
It indicates the relative number of atoms of each kind in a chemical compound.
200
Rule that states that atoms atoms tend to gain,lose or share electrons so that each aom has a full outermost energy level?
octet rule
200
What is ionic bonding?
Chemical bonding that results from the attraction of cations and anions.
200
Why do most atoms form chemical bonds?
Most atoms form chemical bonds to become more stable, they combine and share valence electrons to have their outer shells more full (2 or 8) therefore, becoming more stable
200
A polar molecule contains?
A region of positive charge and a region of negative charge.
200
For what are oxidation numbers used?
To keep track of how many electrons are lost or gained by each atom.
300
The modern periodic law states that the properties of the elements are a periodic function of their?
atomic number
300
One- half the distance between the nucleiof identical atoms bonded together is?
The atomic radius
300
The chemical bonding that results from the attraction of cations and ions is the?
Ionic bonding
300
The mixing of two or more atomic orbitals of similar energies on the same atom to produce new orbitals of equal energies is called?
Hybridization
300
The ionic compound formula represents?
One formula unit, the simplest ratio of the compounds positive ions (cations) and its negative ions (anions)
400
Mendeleev´s periodic law stated that the properties of the elements are a periodic function of their?
atomic weight
400
A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound is…
Electron Negativity
400
Bonds with uneven distribution of charge are?
Polar Bonds
400
What is the molecular geometry to be expected for Pl3?
Pyramidal
400
A formula that shows the simplest whole number ratio of atoms in a compound is the?
Empirical formula
500
Elements in the same group generally show…
increasing size with increasing atomic number
500
The energy change that occurs when an electron is acquired by a neutral atom. Attraction to its own elements, is?
Electron Affinity
500
Compounds have which type of bond? Ionic compounds?