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the electron configuration of aluminum , atomic number 13, is [Ne] 3s2 3p1. What period is Aluminum in?
the periodic law states that the properties of elements are periodic functions of their atomic numbers. This means that the ____ determines the position of each element in the periodic table.
number of protons
The electron configuration of an element is [Kr] 4d6 5s1. To what group does this element belong?
The electron configurations of the noble gases from neon to radon in the periodic table end with filled ___
if n stands for the highest occupied energy level, the outer configuration for all Group 1 elements is ___
Neutral atoms with a s2p6 electron configuration in the highest energy level are best classified as ____
The energy required to remove an electron from an atom _____ as you move left to right from K through Fe
In a row in the periodic table, as the atomic number increases, the atomic radius generally ____
The most useful source of general informantion about the elements for anyone associated with chemistry a ____
the electrons available to be lost, gained, or shared, when the atoms form molecules are called ___
The idea of arranging the elements in the periodic table according to their chemical and physical properties is attributed to ____
The person whose work led to a periodic table based on an increasing atomic number was _____
the ionization energies for removing successive electrons from Na are 496 kJ/MOL, 4562 KJ/MOL, 6012 Kj/MOL, and 9544 kJ/MOL. the great jump in ionization energy after the first electron is removed indicates that ___
the noble gas configuration has been reached
a neutral atom that represents aquiring an electron in an exothermic process is
A + e- > A- + energy
what are the radioactive elements with atomic numbers from 90-103 in the periodic tabble called
the elements whose electron configuration n with s2p5 in the highest occupied energy level belong to ____
bromine, atomic number 35, belongs to group 17. how many electrons does bromine have in its outermost energy level?
the periodic law allows some properties of an element to be predicted on its ____
position in the periodic table
for groups 13-18, the total number of electrons in the highest occupied level equals the group number ___
when determining the size of an atom, by measureing the distance between identical adjacent nuclei, the radius of an atom is ____
half the distance between nuclei
Mendeleev noticed that properties of elements usually repeated at regular intervals when the elements were arranged in order of increasing
a chemical bond formed by the attraction between positive ions an surrounding mobile is a ___
a chemical bond resulting from the electrostatic attraction between positive and negative ions is called an____
in drawing a lewis structure , each nonmetal atom except hydrogen should be surronded by _____
if the lattic energy compound A is greater than that of compound B ____
the bonds in compound A are stronger
the mixing of two or more atomic orbitals of similar energies on the same atom to produce new orbitals of eqaul energies is called
in many compounds, atoms of main-group elements form bonds so that the number of electrons in the outermost energy levels of each atom is
nonpolar covalent bonds are not common because
1 atom usually attracts electrons more strongly than the other
the intermolecular attraction between a hydrogen atom bonded to a strongly electronegative atom and the unshared pair of electrons of another strongly electronegative atom is called
the model for predicting the shape of a molecule that is based on the repulsion of the electrons for each other is called
the greater the electronegativity difference between two bonded atoms, the greater percentage of
a ____ shows the types and numbers of atoms joined in a single molecule of a molecular compound
the octect rule states that chemical compounds tend to form so that each atom has an octet of electrons in the
highest occupied energy level
if a material can be shaped or extended by physical pressure, such as hammering which property does the material have?
the weak intermolecular forces resulting from instantaneous and induced dipoles are called
londen dispersion forces
the electron configuration of nitrogen is 1s2 2s2 2p3. How many more electrons does N need to satisfy the octet rule?
bonding in molecules or ions that cannot be correctly represented by a single lewis structure is
ionic compounds are brittle because the strong attractive forces
hold the layers in relatively fixed positions
the concept that electrostatic repulsion between electron pairs surrounding an atom causes these pairs to be separated as far as possible is the foundation of
the VSEPR theory
a shorthand representation of the compostion of a substance using atomic symbols and numerical subscripts is called a
a formula that shows types and numbers of atoms combined in a single molecule is called a
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