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CHM Ch 4

QuestionAnswer
The primary substances of which all other things are composed are Elements
What elements are in hydroxyapatite, Ca5(PO4)3OH, a major compound in human bones and teeth? Calcium, phosphorous, oxygen, hydrogen
What is a characteristic of the modern periodic table? The elements in each group have similar chemical properties.
Which of the following properties is not a characteristic of the Group 1A (1) elements (alkali metals)? Most of them are liquids at room temperature.
The Group 8A (18) elements ________. Are unreactive and are rarely found in combination with other elements
Strontium is a ... Metal
Nitrogen is a ... Nonmetal
Silicon is a ... Metalloid
Characteristic of nonmetals? Low melting point
Nitrogen is a ... Nobel gas
The elements lithium, sodium, and potassium ________. Are in the same group
The elements sodium, magnesium, and silicon ________. Are in the same period
Which element would have physical and chemical properties similar to chlorine? Br
What is the symbol of the element in Group 4A (14) and Period 2? C
... has chemical properties similar to magnesium Strontium
Helium is a ... Noble gas
The electron arrangement of any particular atom shows The number of electrons in each energy level
The maximum number of electrons that may occupy the third electron energy level is 18
What is the element with the electron arrangement 2,8,7? Cl
What is the electron arrangement for aluminum? 2,8,3
What is the electron arrangement for potassium (atomic number 19)? 2,8,8,1
What element has the electron arrangement 2,8,4? Silicon
The number of electrons in the outer energy level of a neutral atom of boron (atomic number 5) is 3
What is the correct electron arrangement for the lithium atom? 2,1
The number of electron energy levels in a magnesium atom is 3
The number of valence electrons found in an atom of a Group A element is equal to Its group number
Valence electrons are electrons located In the outermost energy level of an atom
In an electron-dot symbol of an element, the dots are used to represent The valence electrons
How many valence electrons are in the electron-dot symbols for the elements in group 3A (13)? 3
The number of dots in the electron dot symbol of nitrogen is 5
The number of dots in the electron dot symbol of carbon is four
The atomic size of atoms Decreases going across a period
The atomic size of atoms Increases going down within a group
The ionization energy of atoms Decreases going down within a group
Ionization energy is The energy needed to remove the least tightly bound electron
The metallic character of elements Increases going down within a group
The metallic character of elements Decreases going across a period
Identify the green-yellowish gas that is used as a disinfecting agent. Chlorine
When filling degenerate orbitals, electrons fill them singly first, with parallel spins is known as Hund's rule
How many valence electrons does an atom of Al possess? 3
How many valence electrons do the halogens possess? 7
How many valence electrons do the alkali metals possess? 1
Place the following elements in order of increasing atomic radius. P Ba Cl Ba < Cl < P
Place the following in order of increasing atomic radius. As O Br Br < As < O
Place the following in order of increasing radius. Br⁻ Na⁺ Rb⁺ Na⁺ < Rb⁺ < Br⁻
Which reaction below represents the first ionization of O? O(g) → O⁺(g) + e⁻
Which reaction below represents the second ionization of Sr? Sr⁺(g) → Sr2⁺(g) + e⁻
Place the following in order of decreasing IE1 (ionization energy for first electron). Cs Mg Ar Mg > Cs > Ar
Created by: alexisperrell
 

 



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