Essment #1 Units 1-3 CALCULATOR
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1. Which of the following is the BEST evidence that rusting is a chemical property rather than a
physical property of iron?
Rust can form on
nanyire
iron.
Rust forms slowly.
o
Rust cannot turn back into iron.
o
Rust does not look the same as iron.
CLEAR ALL

What are the similarities of physical and chemical change ?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Determine the reaction and balance the following equations urgent due in the morning