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Phys Science 17/18

A study test for chapters 17 and 18 of Physical Science

What is a Monatomic element? They only have one atom in natural state.
What is a Diatomic element? They have two atoms in the natural state.
How many elements are there? There are 117
How many elements are naturally occurring? There are 92
Who arranged the elements into what eventually became the periodic table used today? Dmitri Mendeleev
Who placed elements in order of increasing mass, and came up with triads? Johann Dobereiner
What is Periodicity? The repetition of certain properties at regular intervals when elements were placed in order of atomic mass.
Who believed in 4 "elements"? Aristotle
Who discovered how to use x-rays to count the protons in an atom's nucleus to find an element's atomic number? Henry Moseley
What law governs the tendency for atoms to from bonds? The second law of thermodynamics
What is electron affinity? The strength of attraction of electrons to unbonded atoms.
What is electronegativity? An atom's ability to attract and hold electrons when bonded to other atoms.
What do covalent bonds deal with? Non-metal and non-metal
What do Ionic bonds deal with? Metal and non-metal
What do metallic bonds deal with? Metal and metal
Which bond shares electrons? Covalent bonds
Which bond gives away or takes electrons? Ionic bonds
In which bond does all the atoms share electrons? Metallic bonds
What is the Octet rule? Atoms are generally most stable when they have a full eight electrons in their valence energy level
What is the Electron Sea theory? Atoms with weak electronegativities usually on have only a few loosely held valence electrons and share their easily lost electrons among many atoms.
What is a positive ion called? A cation
What is a negative ion called? An anion
What is a polyatomic element? They have many atoms in their natural state.
What is the periodic law of elements? The properties of the elements vary with their atomic number in a periodic way.
What was Mendeleev's periodic law of elements? The properties of elements vary in a periodic or recurring pattern with their atomic masses.
What do chemists use to illustrate the arrangement of valence electrons in an atom? Lewis dot notation
Created by: JonMSmith