WorksheetsPeriodic Table of Elements for Kids | Learn all about the elemen
Total questions: 10
Worksheet time: 8mins
What is an element?
material from the ground around 30BC
A material that is made from a single kind of an atom.
roughly 50,000,000 atoms into one cell.
3,000,000 cells smashing into each other at the same time
What are the"building blocks of all the matter in the universe"?
atoms
cells
elements
electricity
no one knows
Which of these are elements?
OXYGEN/O
CALCIUM/Ca
SURPRISE/Su
UOLIAM/Uolm
How many elements are there.
207
168
998
118
123
How many elements are naturally found on earth?
94
56
78
99
32
What is an atomic number?
unknown
the same number as the element's number of protons
the number of cells in the element
every 5,000,000 of an atom
What year did Dmitri Mendeleev try to organize elements into a grid or table?
1896
1896
1818
1869
1864
How many elements had been discovered in Mendeleev's time?
65
64
63
62
61
27 years after Mendeleev created his table what was discovered?
atoms
electrons
oxygen
red cells
blue cells
What year did Henrey Moseley that elements are different from each other because their atoms have a different number of protons
1784
1456
1913
1783
1699
