10, 3 Exam Flashcards
What determines the order of the elements in the periodic table?
They are ordered based on atomic numbers. Which is the number of protons in the nuclei.
If metals are found on the left hand side of the periodic table, what types of elements are on the right hand side?
Nonmetals are on the right hand side as they have higher electronegativity. This includes noble gases and halogens.
What is the common feature of the electron structure of elements in the last column of the periodic table?
They all have 8 valence electrons (a full outer shell). As a result they are stable and unreactive.
What is the difference between a compound and element?
Elements are pure substances made up of only one type of atom whereas a compound is formed with two or more elements that are chemically bonded.
What is the difference between an atom and an ion?
An atom is neutral, containing the same number of electrons and protons. But an ion an electrically charged particle produced by removing electrons from a neutral atom or adding electrons to a neutral atom.
Why don’t the noble gases form ions?
Because they already have a full outer shell, so they are stable without having to give or gain electrons.
Order of elements
Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium.
