SOL #2
Terms
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- the elements have increasing ______ character as you read from left to right across the table
- nonmetallic
- the number of elements
- more than 110
- This determines an element's chemical properties or chemical reactivity
- the number of electrons in the outermost energy level
- elements with atomic numbers over 92 are:
- artificially produced in a laboratory setting
- gaining or losing electrons makes an atom this
- an ion
- the basis for the arrangement of atoms on the periodic table is:
- the number of protons in its nucleus (atomic number)
- gaining or losing neutrons makes an atom this
- an isotope
- in chemical reactions, metals tend to become these
- positive ions
- the number of outer energy level electrons
- valence
- these are along the stair-step line
- metalloids
- these tend to lsoe electrons in chemical reactions
- metals
- these are located to the right of the stair-step line
- non-metalos
- the boxes for all of the elements are arranged in increasing order of
- atomic number
- elements combine in many ways to produce ______ that make up all substances on Earth
- compounds
- gainingorlosing a proton makes an atom into this
- a completely different element
- a tool used to organize information about the elements
- the periodic table
- the information on the periodic table can be used to predict
- chemical reactivity
- no element with an atomic number greater than this is found in measureable quantities on Earth
- 92
- The metalloids have properties of both:
- metals and nonmetals
- these tend to gain electrons in chemical reactions, forming negative ions
- non-metals