Elements
What Is a Element?
A pure substance made of one atom that cannot be broken down into simpler substances by chemical means.
what other language are some of the chemical symbols abbreviated in?
Latin
what's the chemical formula for water
H20
True or False
Compound cannot be broken down into simpler substances
False
why is the periodic table arranged in groups
showcasing features that elements have in common with each other.
how many elements are named after planets?
4 Mercury (Hg), Uranium (U), Neptunium (Np), and Plutonium (Pu)
what is the chemical symbol for potassium
K
what are chemical formulas used for
identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element.
what is a compound?
A Chemical substances made up of two or more elements that are chemically bound together in a fixed ratio.
how many groups are on the periodic table?
18 groups
what was the first discovered element?
phosphorus
what is the chemical symbol for magnesium
Mg
how many elements are there?
118
NaCI is a ionic compound for what?
Sodium Chloride
who invented the periodic table?
Dmitri Mendeleev
who discovered the first element
Hennig Brandt
who invented chemical symbols?
Jöns Jacob Berzelius. In 1813.
what does the chemical formula for methane
CH4
True or False
Compounds don't naturally occur
True
but not always
why is it named the periodic table
because of the way the elements are arranged. they're in rows and columns.
what three elements are referred to as the iron triad?
Cobalt,Iron,and Nickle
what does the @ symbol mean in chemistry?
it means trapped atoms or molecules
whats the chemical formula for Iron Oxide
Fe2O3
how many compounds are possible?
1060
how many elements were on the first periodic table?
63 elements