Valence Electrons
The noble gases are stable because they usually have this many valence electrons.
What is 8?
Fluorine has 7 valence electrons. It needs this many more to complete its octet.
What is 1?
An atom in Group 13 typically has this many valence electrons.
What is 3?
This particle gives an atom its identity and determines its atomic number.
What is a proton?
These elements are found mostly on the right side of the periodic table, are poor conductors of heat and electricity, and often gain electrons when forming ions.
What are nonmetals?
An atom with 6 valence electrons is most likely found in this group of the periodic table.
What is group 16?
An atom with 1 valence electron will usually form this type of ion when bonding. (include the charge)
What is a +1 cation?
Metals in group 1 on the periodic table most commonly form this type of ion.
What is a cation? OR What is a 1+ ion?
Chlorine has two common isotopes: Chlorine-35 and Chlorine-37. If an atom of Chlorine-37 has 17 protons, how many neutrons does it have?
What is 20?
An unknown element is shiny, a good conductor, is malleable, and ductile. This element would be a
What is a metal?
Elements in this vertical arrangement on the periodic table all share the same number of valence electrons.
What is a group (or family)?
An element in Group 16 typically needs to gain this many electrons to satisfy the octet rule.
What is 2?
These subatomic particles are contained within the core of an atom.
What is a proton and a neutron?
An atom has 19 protons and an atomic mass of 42. How many neutrons does it have?
Silicon, arsenic, and boron belong to this category because they share characteristics of both metals and nonmetals.
What are metalloids?
Helium has this many valence electrons.
What is 2?
An element with 4 valence electrons that form a +4 ion or a -4 ion.
What is carbon? OR silicon? OR Germanium? OR Tin? OR lead?
This element will share the same number of valence electrons as helium.
What is: Beryllium OR Magnesium OR Calcium OR Sr OR Ba OR Ra
A sodium atom becomes this type of ion when it achieves a full outer shell by losing one electron.
What is a cation?
An unknown element is a gas and is a poor conductor. This element would be a
What is a nonmetal?
Elements with this number of valence electrons are the least reactive (or stable) on the periodic table.
What is 8?
Atoms tend to gain, lose, or share valence electrons to achieve this stable configuration.
What is the octet rule?
Magnesium (Mg) has an atomic number of 12. If a sample of a Magnesium isotope has an atomic mass of 25, how many neutrons does it contain?
What is 13?
The periodic table is divided into groups. In general, elements that belong to the same group share this in common.
What is valence electrons? OR What is similar chemical properties?
An unknown element is shiny, somewhat conducts electricity, and is brittle. This element would be a
What is a metalloid?