What is the difference between a 'group' and a 'period' on the periodic table?
What does the atomic number tell you about an element?
Select all the TRUE statements about molecules.
In physical changes, substances might change in
What happens to atoms after a chemical change?
Explain how either choice B or choice C makes the statement about the ending substance a TRUE statement. Use complete sentences when you write your response.
Select ALL the options that demonstrate the physical properties of matter.
How many atoms are part of this molecule?
What is the atomic number of the element - Oxygen?
Explain how this chemical formula demonstrates how a chemical reaction has occurred.
This chemical formula correctly demonstrates the Conservation of Matter Law, which states matter can't be created or destroyed. Matter can only be transformed through conservation through physical or chemical changes.
Does this model correctly show why the properties of the ending substances are different from the properties of the starting substances? Describe what could be correct or incorrect about his model.
Scientist Dmitri Mendeleev created the Periodic Table of Elements.
Identify the element that has 20 protons in its nucleus using the periodic table.
What is the elemental symbol for Iron?
