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chem 3 awais 8

All of the following elements are metals except Chlorine
The second row of the periodic table includes elements 32
is an unreactive elements Helium
Which of the following is a transition elements? Nickel
All of group 1 elements have one valence electrons
Each row in the periodic table ends with a noble gases
In going from left to right in any given row in the periodic table the size of the atoms generally decrease
Compared to the neutral atom from which it is derived, a negative ion is Always larger
Which elements has the largest atomic radius? Al
Which elements has the smallest radius? Cl
Which elements has the lowest first ionization energy? At
Which elements has the highest first ionization energy? Ar
Which ion has the largest radius? Na+
Which elements has the lowest electronegativity? Cs
Which element has the higest electronegativity? N
Fluorine, Bromine, or iodine is Halogens
An element found in group 1 of the periodic table is Alkali metals
In compound, has an oxidation number of 2+ is Alkaline Earth metals
Sodium or cesium Alkali metals
In compounds, has an oxidation number of 1- Halogens
An elements found in group 17 is Halogens
Magnesium or barium is Alkaline earth metals
In compound, has an oxidation number of 1+ is Alkali metals
An elements found in the group 2 is Alkaline earth metals
Is harder and denser than its alkali neighbor Alkaline earth metals
Strontium, which is identified by the red color of fireworks is Alkaline earth metals
Astatine is the largest of this family is Halogens
Luster is Metals
Tightly held valence is Nonmetals
At the right side of the periodic table is Nonmetals
semiconductors is a Metalloids
Good conductors of electricity is Metals
Usually quite brittle is Nonmetals
Properties intermediates between metals and nonmetals Metalloids
A variety of colors is Nonmetals
Three to eight valence electrons is Nonmetals
Poor conducators of heat is Nonmetals
Hydrogen Has only one electron
First period Contains two elements
Second period Contain eight element
Group 2 element Have two valence electrons
Magnesium Has one more electron than sodium
Oxygen has six valence electrons
Noble gases Are very unreactive
Transition elements Have unpredictable properties
Metals Have loosely bound valence electrons
Nonmetals Tend to gain electrons in chemical reactions
A Lewis electrons dot structure shows the total number of electrons in the atom of an elements. False its valence electrons
The electrons dot structure for a metals is likely to have one, two, of three electrons. True
An element with an electron dot structure containing only one electron is likely to be found in the group 7 of the periodic table. False Group 1
Why do elements in the same group period have properties that are different from one another? Because the number of valence electrons increase as you move from left to right across the period.
How does the size of an atoms change when it loses electrons to become a positive ion? It gets smaller more pull on remaining electrons is stronger (more protons).
How does the size of an atom change when it gains electrons to become a negative ions? It gets smaller less attraction because there are more electrons added.
At room temperature, what state (solid, gas, or plasma) are the majority of the elements in on the periodic table? Solid
Are most elements metals, nonmetals, or metalloid? Metals
Elements that have the same number of act in similar ways? Valence electrons
What is the purpose of the zigzag line on the periodic table? Transition between metals and nonmetals. Elements on the line have properties of both.
Which metals family is considered the most reactive? Alkali metals
Which nonmetals family considered most reactive? Halogens
Which family is considered the most stable? Noble gases
What are synthetic elements? An elements that doesn't occur naturally on earth, but can be created artificially.
Metals: Luster, conduct heat and electricity, malleable, ductile, lose electrons in the reaction, valence electrons, held loosely, solids room temperature, high melting points.
Nonmetals: Poor conductors of heat and electricity, lower melting point, tightly held valence electrons, tend to gain and share electrons in reaction. Gases and room temp.
Metalloids: Properties of both metals and nonmetals, some are semiconductors 3-6 valence electrons.
Electronegativity Attraction for bonding electrons. --------------> from left to right it's increase ->decrease. From top to bottom it's decrease
Ionization energy Energy required to remove electrons From left to right it's increase, and from top to bottom it's decrease.
Atomic Radius Radius of atoms, describe the size of atoms. From left to right it's decrease, and from top to bottom it's decrease.
Reactivity Metals Reactivity from highest to lowest. From left to right it's decrease, and from top to bottom it's increase.
Reactivity Non Metals An elements incaple of forming simple positive ions in solution. From left to right it's decrease, and from top to bottom it's increase. Reason: How easily electrons can be removed or attracted.
The mordern periodic table is arranged according to it's atomic number
The period number of an elements is the same as the ---------- of it's outermost level. Number
The --------- electrons of an elements in the second period, for example are in the ---------- second energy level. Valence, second
A period 3 elements has its valence electrons in the --------- energy level. three
The number of valence electrons changes from ---- to ---- as move left to right across a period for main group elements (skipping the transition elements). 1 to 8
Created by: awais.jat



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