table terms
location
group
period
id the element
100
elements
what does the periodic table categorize?
100
metals
What group is located on the left side of the periodic table?
100
families
columns that go up and down are called?
100
rows that go side to side
what direction do periods go ?
100
5 protons
how many protons does element boron have?
200
atomic number
what distinguishes an element?
200
alkaline metals
what are the second most reactive metals in the periodic table?
200
similar properties
what do elements in the same group have in common?
200
energy levels
periods categorize elements by what?
200
neutrons equals 7
approximately how many neutrons does element nitrogen have?
300
false- amu
true or false? the atomic mass is measured in lbs?
300
valence electron
what is located on the outer energy ring of an atom?
300
groups 3-12
transition metals range from what number of groups?
300
2 elements
period 1 has how many elements?
300
reacts with lithium and sodium
with what elements does fluorine react with?
400
alkali metals
what are the most reactive metals in the periodic table?
400
metalloids
what elements are in between non-metals and metals?
400
reactivity- stable
What is since noble gases are categorized in group 18 what is their reactivity?
400
9 categories
how many categories of elements does period 6 have?
400
symbol Od
what is the symbol for osmium?
500
periodic rule?
What rule states that the periodic elements increases as you move from each element?
500
nucleus
where is the atoms mass located?
500
group 15
if an element has 5 valence electrons what group is it in?
500
actinides
in group seven what series is elements 57-70 called?
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