Phy Sci chapter five Flashcards
Magnesium is located to the right of sodium because Magnesium has what
More protons
In Mendeleev’s periodic table, elements in each column had similar what
Properties
As you move from left to right across the periodic table, elements do what
Become less metallic
How was Mendeleev’s periodic table arranged
By increasing atomic masses
What is Mendeleev known for
Publishing the first periodic table
When did Mendeleev create a new row in his periodic table
When chemical properties were repeated
Mendeleev left gaps in his periodic table because
No known elements fit there
The law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
Periodic law
A horizontal row of elements in the periodic table
Period
A vertical column of elements in the periodic table; elements in this share chemical properties
Group
What are the periodic trends in the periodic table the result of
Electron arrangement
What accounts for similar properties
Valence electrons
What is an element’s location in the periodic table related to
Electron arrangement
What kind of ions do group 1 form
Positiv
What kind of ions do group 17 form
Negative
What do elements in each category have
Similar properties
An element that is shiny and that conducts heat and electricity well
Metal
What are some properties of metals
Easily drawn into thin wires (ductile)
Easily shaped or formed (malleable)
Shiny
An element that conducts heat and electricity poorly
Nonmetal
What are some properties of nonmetals
Poor conductors of electricity
Poor conductors of heat
Not malleable or ductile
Not shiny
An element or compound that com dicta electric current better than an insulator does but not as well as a conductor does
Semiconductor (metalloid)
What are some properties of semiconductors
Share properties with metals and nonmetals
Conduct electricity under certain conditions
Main components of chips in computers and in other electronic devices
What does each element family have in common
They have the same number of valences electrons
What are the 3 families of metals
Alkali metals
Alkaline-earth metals
Transition metals
One of the elements of group 1 of the periodic table
Alkali metal
One of the elements of group 2 of the periodic table
Alkaline-earth metal
One of the metals that can use the inner shell before using the outer shell to bond
Transition metal
What metals are very reactive
Alkali
What are some properties of alkaline metals
Soft Shiny Similar melting points Similar boiling points Similar densities
What metals form compounds that are found in limestone and in the human body
Alkaline-earth metals
What are some properties of alkaline-earth metals
Hard
Dense
Strong
High melting points
What metals are in the middle of the periodic table
Transition metals
What are some properties of transition metals
Hardest of the metals
Densest of the metals
Highest melting points of the metals
What are the 2 families of nonmetals
Noble gases
Halogens
One of the elements of group 18 of the periodic table
Noble gas
One of the elements of group 17 of the periodic table
Halogen
What gases are relatively inert
Noble gases
What do noble gases exist as
Single atoms instead of molecules
Why are noble gases inert
Their s and p orbitals are filled
They do not form ions or compounds
What nonmetals combine easily with metals to form salts
Halogens
How do halogens become stable
The addition of a single electron
What do halogens combine easily with
What do they form
Metals (especially alkali)
Salts
How many other nonmetals are on the right side of the periodic table
6
What can form many compounds
Carbon
How many carbon-containing compounds are there
Millions
Able to conduct heat and electricity under certain conditions
Semiconductors
