When Mendeleev and other scientists arranged elements in order of increasing atomic mass, they noticed a repeating pattern of __
_____________.
This is known as periodic law.
properties
pizzas
polygons
pyramids
1 answer:
The only answer that really makes sense here is the first one, properties. I would go with that one.
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I think u asked for the atoms of sulfur? its 4..
Explanation:
calcium = 4
sulfur = 4
oxygen = 4
I hope this is correct
Answer:
NaCl
Explanation:
none of them. Salt presents NaCl
It is a limiting reactant. Not a catalyst as a catalyst is <em>not</em> used up in a reaction