Show:
All in the Family
Periodic Trends
Element Smack-down: Metals vs. Nonmetals
It's a Group Thing
Mixed Nuts
100
Which family contains the most reactive metals on the periodic table? Which metal is the most reactive in this family?
The Alkali Metals are the most reactive metals, francium is the most reactive element in this family.
100
How many rows are there in the periodic table?
Seven (7)
100
Which type of element makes up the majority of the periodic table, metals, nonmetals or metalloids?
The metals make up 2/3 of the periodic table.
100
How many columns are there on the Periodic Table?
Eighteen (18)
100
Who is considered to have constructed the first table charting the elements?
Dimitri Mendeleev
200
What family does an element with 20 electrons belong to?
The Alkaline Earth Metals.
200
Are elements with similar valence electron configurations located in the same row or in the same column?
Elements with the same number of valence electrons are in the same group.
200
Are boron, silicon and tellurium metals, nonmetal, or metalloids?
They are metalloids.
200
Which of the following is the largest: a chlorine atom, a bromine atom, or an atom of iodine?
Iodine is the largest with a radius of 132 pm. It has 5 energy levels of electrons.
200
Who reorganized the periodic table by placing the elements in order based upon their atomic numbers?
Henry Mosley
300
Which family is responsible for colors in compounds? This family also has elements that can have more than one positive oxidation state.
The transition metals
300
Explain the relationship between the size of a cation to its atom and the charge of the ion.
Cations are positively charged, because they lose electrons. The size of a cation is smaller than the parent atom.
300
Where is the approximate dividing line between metals and nonmetals?
The boron staircase divides the metals from the nonmetals.
300
Which family is most likely to form ions that will have a +3 charge?
Group 13 will produce ions with a +3 charge because they have 3 valence electrons.
300
An element with both metallic and nonmetallic properties is called a metal, nonmetal, or metalloid?
Metalloids have both metallic and nonmetallic properties.
400
Which family on the periodic table contains elements in all three phases? Identify each elements phase.
Group 17 the Halogens have elements in all 3 phases. F and Cl are gases Br is a liquid I and At are solids
400
Why do atoms get smaller as you move across a period? Use atomic structure to help you form your answer.
As you move across a period the nuclear charge (# of protons) increases and attracts the valence electrons more pulling them in and making the atom smaller.
400
Explain why metals are commonly used for electrical wiring and piping for heating. Make sure to list at least 3 physical properties to back up your answer.
Metals are malleable (can be flattened), ductile (can be drawn into wire), and are good conductors of heat and electricity.
400
Calcium and barium are both members of the Alkaline Earth Metals, explain why barium has a larger radius.
Barium has a larger radius than calcium because it has more energy levels. Barium has 6 energy levels while calcium has 4.
400
A compound has a formula of XCl2. What group on the periodic table is X a member of and how many valence electrons does X have?
X is part of group 2 (Alkaline Earth Metals), it has 2 valence electrons.
500
Using their atomic structure, explain why the Noble Gases are unreactive and do not form ions.
Noble Gas elements have a completely filled valence shell of 8 electrons (2 in He) this is why they are unreactive and do not form ions.
500
Contrast ionization energy and electronegativity. In general what can you say about these values for metals and nonmetals?
Ionization energy is the energy needed to remove an electron, electronegativity measures an elements attractiveness for electrons. Metals have low I.E. and electronegativities while nonmetals have high I.E. and electronegativties.
500
Metallic properties tend to increase in which direction on the periodic table: left to right or right to left? Give one reason using the setup of the periodic table to back up your answer.
Metallic properties increase right to left across a period because metals begin every period and nonmetals end every period.
500
Scandium (Sc), yttrium (Y), and lanthanum (La) are located near each other in the periodic table. Which of these elements has the smallest ionization energy?
Lanthanum has the smallest ionization energy in this group. Sc 633 kJ Y 600 kJ La 538 kJ
500
Lithium and sodium are rarely found in nature as pure elements. They are usually combined with other substances. Explain why this is so.
Lithium and sodium are highly reactive group 1 metals and easily give up electrons to combine with other elements.