physical properties
a characteristic that can be observed with out changing the substances chemical make up
physical property
how a substance reacts with another substance is an example of a ___________________
chemical property
elements are the building blocks of ____________
matter
what is the periodic table
it is a way to organize the elements by similar properties
What happens when backing soda (sodium bicarbonate) and citric acid are mixed with water? name at least 2
it fizzes and gets cold
A block of gold that has been cut into pieces
physical change
A characteristic that determines how a product interacts with other substances
chemical property
an element is
who first created the periodic table
Dmitry Mendeleyev
Give at least two other examples of results that came from reacting the white substances with water
turned yellow, formed hard blobs, got warm, foamed
If a glass of water is placed in a freezer, is it still water? why?
Yes, because a phase change is only a physical change (phase is physical property)
If hydrogen and oxygen combine together, they create water. This is an example of a _____________
chemical change or chemical property
name a two (+) of the "original" elements
air, water, fire, earth
How was the first periodic table organized
from lightest to heaviest element
What are the three ways you could refer to the white substances you were using?
chemical name, chemical formula, common name
If a substances mass or volume changes is it still the same substance? why?
Yes, because it is a physical change.
Give an example of a chemical property
how a substance reacts with water, air, oil, ect.
What were some of the things scientists did to discover elements
heat, freeze, electrify, or mix with acid until they would not change any more
by rearranging the table so elements were in columns by similar properties, he could see where gaps suggested missing elements
the common name for sodium chloride is table salt, what is the chemical formula for sodium chloride
NaCl
Give at least three examples of physical properties
magnetism, density, shape, phase of matter
By running electiricty through water, you can get waters molecules to separate, because one of water's chemical properties is that it reacts with electricity. What will you have after the water is reacted with electricity
hydrogen and oxygen
name five elements we now know
varies
Elements with similar properties are grouped together, name at least three of those groups
alkaline earth metals, alkali metals, metals, nonmetals, noble gasses, metalloids
What elements were in citric acid and sugar? How are they different?
carbon, oxygen, and hydrogen. there are different amounts of those elements