Periodic Table Part 1 Flashcards
How are elements in the periodic table arranged?
By increasing atomic number and similar chemical properties
Compared to the 128Te2- ion, what will the mass and number of electrons be for a 127I- ion?
A lower mass and an equal number of electrons
What are the columns and rows in the periodic table known as?
Columns = Groups Rows = Periods
What are some examples of non-metallic elements found as gases at room temperature?
Nitrogen, oxygen, fluorine, chlorine
What are group 1 elements known as in the periodic table?
Alkali metals
What are group 2 elements known as in the periodic table?
Alkaline earth metals
What are group 17 atoms known as in the periodic table?
Halogens
What are group 18 atoms known as in the periodic table?
Noble Gases
What are the elements in the higher of the two rows found at the bottom of the periodic table known as?
Lanthanides
What are the elements in the lower of the two rows found at the bottom of the periodic table known as?
Actinides
What do two elements next to each other in the periodic table, in the same period but not the same group have in terms of electron shells, valence electrons and properties?
Same number of electron shells, different number of valence electrons, different chemical properties
What is the middle section of the periodic table comprised of?
Transition metals
What is the mass number?
The sum of the protons and neutrons of an atom
What is the nucleus?
Where most of an atoms mass is found, including protons and neutrons
What is an electron?
A tiny negatively charged particle around the nucleus
