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100
positive ion
What is a cation?
100
Elements in which the d-sublevel is being filled have the properties of
What are metals?
100
The number of valence electrons in Group 1 elements is
What is 1
100
The most characteristic property of the noble gases is that they
What is are unreactive?
100
horizontal row of blocks in the periodic table
What is a period?
200
electrons available to be lost, gained, or shared when atoms form compounds
What are valence electrons?
200
The most reactive group of the nonmetals is the
What are halogens?
200
The force of attraction by Group 1 metals for their valence electrons is
What is weak?
200
The elements in Group 1 are also known as the
What are alkali metals?
200
The idea of arranging the elements in the periodic table according to their chemical and physical properties is attributed to
What is Mendeleev?
300
measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound
What is electronegativity?
300
Within a group of elements, as the atomic number increases, the atomic radius
What is increases?
300
Valence electrons are those s and p electrons are located in what energy level
What is in the highest energy level
300
Compared to the alkali metals, the alkaline-earth metals
What is are less reactive?
300
The person whose work led to a periodic table based on increasing atomic number was
What is Moseley?
400
energy required to remove an electron from an atom
What is ionization energy?
400
Across a period, ionization energies of d-block elements generally
What is increase?
400
In Period 3 there are 8 elements. What sublevel(s) is (are) being filled?
What are s and p?
400
The group of 14 f block elements in the sixth period is the
What are lanthanides?
400
The elements whose electron configurations end with s2 p5 in the highest occupied energy level belong to Group
What is 17?
500
when an electron is acquired by a neutral atom
What is electron affinity?
500
Among the d-block elements, as atomic radii decrease, electronegativity values ______.
What is increase?
500
Identify the sublevels in a period that contains 32 elements.
What is s, p, d, f?
500
The periodic law allows some properties of an element to be predicted based on its
What is place in periodic table?
500
The electron configuration of cesium, atomic number 55, is [Xe] 6s1. In what period is cesium?
What is 6?