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Ch. 5 - Tinder

The Periodic Table

QuestionAnswer
Mendeleev arranged the elements based on _________________ in his periodic table. the element's atomic mass
Elements are ordered according to _____________ on our periodic table. an element's atomic number
Elements within the same group have the same number of _________. valence electrons
The process of losing or gaining electrons is called _________. ionization
Elements that share properties of both metals and nonmetals are called ________. semiconductors
If elements belong to the same family, they often have a similar ___________. appearance
Where are alkali metals located on the periodic table? left-most column
What exists as single atoms rather than as molecules? noble gases
Why are Group 18 noble gases relatively inert? Their s and p orbitals are filled.
Silicon is not a semiconductor. True or False False. Silicon IS a semiconductor.
What was so important about Mendeleev's periodic table? He predicted new elements.
In the modern periodic table, elements appear at regular intervals if they have similar ________. properties
A group's elements react similarly because of their ______________. valence electrons
When an element's outermost energy levels are only partially filled, some elements are highly _______. reactive
Elements that are usually shiny. metals
Elements in a family in the periodic table have similar _____ and _______ properties. physical and chemical
Which metals are located in the center of the periodic table? transaction metals
What Group do noble gases belong to? Group 18
What is the name of elements that can conduct heat and electricity under certain conditions? semiconductors or metalloids
When Mendeleev studied the properties of the elements, what was he looking for? patterns
As you move from left to right across a period in the modern periodic table, what do you notice about the elements? They become less metallic.
A filled outer s orbital results in a ________. less reactive atom
Metals tend to be good conductors of heat. True or False? True
Because Alkali metals have one valence electron that is easily removed to form a positive ion, they are extremely _____. reactive
How do most halogens form compounds? by gaining an electron to form a negative ion
How do copper or tungsten form compounds since they are transition metals? losing electrons to form positive ions
Computers use a semiconductor ___________. silicon
When properties were repeated in Mendeleev's periodic table, he started a new ___. row
What does the periodic law state? when elements are arranged by atomic number, elements with similar properties appear at regular intervals.
Which property, chemical or physical, is determined by the number of valence electrons? chemical
What are nonmetals that do not conduct heat or electricity well called? insulators
Metals are divided into 3 families based on the number of ______ they have. valence electrons
What metals make up Group 1? Alkali Metals
What are the reactive elements in Group 17 called? valence electrons
What are not metals but have some properties of metals called? semiconductors or metalloids
Why would a jeweler want to use metals in their work? Metals are easily shaped and drawn into wires. Nonmetals aren't malleable or ductile. Metals are also shiny.
Why has the development of the periodic table been so important to chemists? It is used to organize the elements by atomic number and properties. They can easily find elements with similar physical and chemical properties because they are in the same group or family.
Would you say semiconductors are opposite of conductors? No. They are somewhat-but not entirely-like metals. Metals can conduct heat and electricity. Under certain circumstances, semiconductors can but not always.
What is the difference between and atom and a molecule? Atom=smallest unit of an element Molecule=consists of 2 or more atoms
What is the definition of an ion? An ion is a changed atom or molecule.
What type of charges do a cation and an anion have? A cation has a positive charge; an anion has a negative charge.
Identify some examples of transition metals and their uses. Gold, silver, platinum, copper, nickel, and zinc; Uses include wiring, jewelry, and as conductors of heat and electricity
How does the period law apply to halogens? They have the same valence electrons (7) and similar chemical properties.
Differentiate alkali metals and alkaline-earth metals. Identify ways each are used. Alkali metals-highly reactive, metallic elements. Alkaline-earth metals-less reactive. Alkali metals like sodium are found in compounds like sodium chloride. Alkaline-earth metals like calcium are found in limestone, building materials, and in our body
The majority of elements in the periodic table are noble gases or conductors? conductors
Created by: TinderT
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