in general
what is the periodic table full of?
elements
(please tell me you got this right)
how many categories are there in total?
11
who invented the periodic table?
Dmitri Mendeleev Russian Chemist
what was the first element?
Technetium
what is an element made of?
an atom
what is an element made of?
an atom
what category is helium in?
noble gases
__ out of the 118 elements on the periodic table occur naturally and the rest are man made.
94
___out of the 118 elements on the periodic table occur naturally and the rest are manmade.
94
what is an atom like?
the solar system!
how many elements are there?
118
Non metals
oxygen
what did i ask you to right your answers on?
white bored
•Helium is on earth, but it was discovered by observing the _______.
the sun!
where are the electrons?
A: outside
B:inside
A: outside
what was Dmitri Mendeleev's job?
chemist
name three categories.
any of the following:
Alkali metals
Alkaline earth metals
Transition metals
Post transition metals
Halogens
Noble gases
Lanthanides
ect.
how many categories are there in total?
11
Helium is on earth, but it was discovered__________________
by observing the sun
what is an atom made of?
protons, neutrons and electrons.
it between 1868 and finished in 1870.
what category is carbon in?
non metals
complete this sentance:
It was invented to________, ________ and see the elements similar relations with each other.
organise, compare
Chemical elements on the periodic table are grouped together using several different_________
grouping mathods
what is in the middle of an atom?
A: protons
B: neutrons
C:electrons
if you answered......
A or B you are correct!