6.2 and 6.3 Flashcards
What are the subatomic particles that play a key role in determining the properties of an element
Electrons
Why are group A elements called representative elements
They display a wide range of physical and chemical properties, groups 1A-7A
Inner transition metals
The elements located in F block
Transition metals
The elements located in D block
Noble gases
Group 8A
Atomic size trends
Increases from top to bottom in a group because the number of energy levels increases, decreases from left to right across a period as the nuclear energy pull increases. Atoms size is an atom’s atomic radius, or one half the distance between two like atoms when they are joined together.
Cation
Positively charged, forms when an atom loses one or more electrons
Anion
Negatively charged, forms when an atom gains one or more electrons
Trends in Ionization energy
Ionization energy is a measure of the amount of energy required to remove one electron from a neutral atom. It decreases from top to bottom within a group, and it increases from left to right across a period.
Trends in ionic size
Trends are based in the fact that metals tend to lose electrons, and nonmetals tend to gain electrons. A cation is smaller than than the atom that formed it. Anion is larger than the atom that formed it. Ionic size increases from top to bottom and decreases from left to right.
Trends in Electronegativity
Measure of an atoms ability to attract an electron when the atom is bonded to another atom. Decrease from top to bottom, increase from left to right
Two variables that affect atomic size within a group
Energy levels and nuclear charge
Ion and how are they formed
Atom or group of atoms w/ positive or negative charge, form when electrons are transferred between atoms
Why does ionization energy decrease from top to bottom within a group
As the electrons get further from the nucleus, the amount of energy needed to remove it decreases, attraction to nucleus is weaker.
Non metals have a ____ electronegativity value than metals
Higher