Chemistry Chapter 6 2
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- What is the underlying cause of periodic trends?
- variations in atomic stucture
- trends - electronegativity
-
decrease from top to bottom
increase from left to right - trends - ionic size
-
cations smaller than atom from which they form
anions larger - trends - first ionization energy
-
decrease top to bottom
increase left to right
(opposite atomic size) - how do ions form?
- electrons are transfered between atoms
- how is the periodic table organized?
- in order of increasing atomic number
- What are the trends among the elements for atomic size
-
increase top to bottom
decrease left to right - how did chemists begin to organize the known elements
- They used the properties of the elemtents to sort them into groups
- how did Mendeleev organize his periodic table?
- in order of increasing mass
- What are three broad classes of elements?
- metals, nonmetals, metalloids
- What type of info can be displayed in a periodic table?
- symbol and names of elements and info about the structure of the atom
- How can elements be classified based on their electron configuration?
- noble gasses, representative elements, transition metals, innertransition metals
- What is flourine's electronegativity value
- 4.0
- State the trends for atomic size in groups and periods
-
increases as down
decreases as across - hallogen valence electron configuration
- ns^2 n p^5
- What metal is not solid?
- mercury (Hg)
- Why is silicon an important metaloid?
- silicon chips used in computers
- Which nonmetal is a liquid?
- Bromine
- Noble gasses are also called...
- inert gasses
- Why didn't medeleevs periodic table work
- since there were isotopes, the atomic mass for a single element wasn't constant