Vocab
This is the horizontal row of a periodic table
Period
In the periodic table, explain the trends of atomic mass
Increases down a group and increases from left to right in a period
This is the type of ion formed when an element loses an electron
Cation
Group 1A elements are known as;
Alkali Earth Metals
How many moles are in 40g of H2O?
2.22 mol H2O
This is the vertical column of the periodic table
Group
In the periodic table, explain the trends of atomic radii
Increases down a group, and decreases from left to right
This is the type of ion formed when an element gains an electron
Anion
Group 2A elements are known as;
Alkaline Earth metals
How many atoms are in 14 mol of Cadmium?
8.4 x 1024 atoms Cadmium
This group of elements has properties of both metals and nonmetals
Metalloids
Of these 3 elements, arrange them in order of increasing atomic radii; K, Br, and Ga
K>Ga>Br
When removing an electron from an element in Group 1A, the configuration is now the same as what?
The electron configuration for the noble gas before it
Group 7A elements are known as;
Halogens
What is the mass of 3.7 moles of Na2O?
230 g Na2O
Half the distance between nuclei of identical atoms joined in a molecule
Atomic Radii
In the periodic table, explain the trends of ionization energy
This group of elements tends to lose electrons and form cations
Group 8A elements are known as;
How many molecules are in 25.8 g Hg
7.74 x 1022 molecules Hg
This is the measure of an atom's ability to gain an electron
Electronegativity
Explain the trends of electronegativity in the periodic table
Decreases going down a group, and increases from left to right in a period
What makes a metal more reactive?
A lower ionization energy and a larger atomic radius.
How do you compare atoms in the same group? Ex. Why is C smaller than Pb?
Energy levels! Carbon has less energy levels.
DAILY DOUBLE!!
How many grams are in 6.14 x 1025 atoms of gold?
20,100 g gold