Chemistry Module 5 Gauth Math checked
In the compound X20, what is the group of the unknown element?
1
In the compound XCl, what is the group of the unknown element?
1
How many valence electrons are in beryllium?
2
How many valence electrons are in phosphorus?
5
In the compound NaX, what is the group of the unknown element?
7
How many valence electrons are in neon?
8
The group 1 elements (except for hydrogen) are known as the
Alkali Metals
The _____ increases as you move left and down.
Atomic Radius
The ___-block contains the transition metals and is the largest of the blocks.
D
In general, what is the trend in ionization energy as you go down a group?
Decrease top to bottom
The ___-block contains the inner transition metals.
F
A typical box from the periodic table contains the element's name, its chemical symbol, its atomic number, and it's charge.
False
Beginning with hydrogen in period 1, there are a total of 8 periods.
False
Elements with similar properties are in the same row.
False
An unknown element X has 7 valence electron so it must belong in the ______ group.
Halogen
Group 17 comprises highly reactive elements that are known as ______.
Halogen
In general, what is the trend in ionization energy as you go across a period?
Increase left to right
_______ have physical and chemical properties of both metals and nonmetals.
Metalloids
The _______ states that atoms tend to gain, lose, or share electrons in order to acquire a full set of eight valence electrons.
Octet rule
After the s sublevel is filled, the valence electrons next occupy the ___ sublevel.
P
The ___-block consists of groups 1 and 2, and the element helium.
S
Atomic radii generally increase as you move down a group on the periodic table.
True
Period 4 contains potassium and calcium.
True
The elements in groups 1, 2, and 13 to 18 possess a wide range of chemical and physical properties and are referred to as the main group, or representative elements.
True
The elements in groups 3 to 12 are referred to as the transition elements.
True
The loss of a valence electron can leave a completely empty outer shell, which results in a smaller radius.
True
The periodic table has columns and rows of varying sizes. The reason behind the table's odd shape becomes clear if it is divided into sections, or blocks, representing the atom's sublevel being filled with valence electrons.
True
The rows are called periods.
True
An unknown element X has 1 valence electron so it must belong in the ______ group.
alkali metals
An unknown element X has 2 valence electron so it must belong in the ______ group.
alkaline earth metals
The ______ increases as you move up and left.
atomic radius
The statement that there is a periodic repetition of chemical and physical properties of the elements when they are arranged by decreasing atomic number is called the periodic law.
false
When atoms lose electrons and form positively charged ions, they always become larger.
false
Atoms with loosely held electrons are usually classified as metals. They will exhibit high conductivity, ductility, and malleability because of their atomic structure. Would you expect metals to have high ionization energies or low ionization energies?
low ionization energy
Elements that are generally shiny when smooth and clean, solid at room temperature, and good conductors of heat and electricity are called
metals
An unknown element X has 8 valence electron so it must belong in the ______ group.
noble gases
The extremely unreactive group 18 elements are commonly called the _________.
noble gases
Different patterns can be observed in the periodic table. The patterns organize and can predict the properties of elements.
true
Moving down a group, the outermost orbital increases in size along with the increasing principal energy level, thus, the atom becomes larger.
true
The columns are called groups, or families.
true
