Family Reunion
These unreactive elements in Group 18 have complete outer energy levels.
What are Noble Gases?
Lithium (Li) sits in Group 1, giving it this specific number of valence electrons.
What is 1 valence electron?
Between Lithium (Li) and Potassium (K), this metal is more reactive.
What is Potassium (K)?
An element (X) from Group 2 combines with Oxygen (O) to form a neutral molecule with a 1:1 ratio, giving it this formula.
What is XO?
A solid material is shiny, malleable, and conducts electricity very well. Identify whether this element is a metal, metalloid, or non-metal.
What is a Metal?
Members of Group 1 are known as Alkali metals, while members of Group 2 are called by this name.
What are Alkaline Earth Metals?
Every element in the Alkaline Earth metal group possesses this number of valence electrons.
What is 2 valence electrons?
Non-metal reactivity follows the opposite trend of metals, making this element in Group 17 the single most reactive non-metal on the periodic table.
What is Fluorine (F)?
When Potassium (K) bonds with Fluorine (F), they combine in a 1:1 ratio to form this chemical formula.
What is KF?
A student claims that Helium (He) has 8 valence electrons because it is a Noble Gas in Group 18. Explain why this claim is incorrect.
Helium is in Period 1 and can only hold a maximum of 2 valence electrons in its outer shell?
Highly reactive non-metals located in Group 17, such as Fluorine and Chlorine, belong to this group.
What are Halogens?
Oxygen (O) and Sulfur (S) are located in Group 16, meaning they have this many valence electrons.
What is 6 valence electrons?
This specific group contains the single most reactive group of metals on the periodic table.
What is Group 1 (Alkali Metals)?
An element (X) from Group 1 combines with Oxygen (O, which needs 2 electrons) to form a compound with this formula.
What is X2O?
A student claims that because Hydrogen ($\text{H}$) sits at the top of Group 1, it is an Alkali Metal. Agree or Disagree, and why?
Hydrogen is a non-metal gas, even though it has 1 valence electron?
Group 2 elements share this specific valence electron count and general big family classification.
What are metals with 2 valence electrons?
Nitrogen (N) and Phosphorus (P) in Group 15 require this many additional electrons to complete their valence shell.
What is 3 electrons?
Metal reactivity increases as you move down a group primarily because this energy requirement decreases.
What is Ionization Energy?
An Alkali metal (Na) bonds with Sulfur (S, which needs 2 electrons) to yield a compound with this general formula.
What is Na2S?
Explain why Potassium (K) is significantly more reactive than Calcium (Ca), even though both sit next to each other in Period 4.
Potassium only needs to lose 1 valence electron to attain a stable octet, whereas Calcium must lose 2?
Group 1 is the Alkali metals, what are some physical properties of these metals.
What is malleable, good conductor and typically a solid at room temperature?
When a neutral alkali metal loses its outer electron during a chemical reaction, it forms an ion with this charge.
What is a +1 charge?
Among the alkaline earth metals, Strontium (Sr) is more reactive than Calcium (Ca) because Strontium has lower this.
What is lower ionization energy?
Magnesium (Mg) combines with Chlorine (Cl) to produce a stable compound with this specific formula.
What is MgCl2?
A student claims Potassium (K) and Krypton (Kr) have similar chemical reactivity because they are both in Period 4. Agree or Disagree, and why?
Disagree, because elements in the same period have different numbers of valence electrons, giving them completely different chemical reactivities?