What has both physical and chemical properties?
What is A) Matter, B) Volume, C) Density, or D) Weight?
What is A) Matter ?
100
In a chemical reaction, the original substances that change are called the what.
What are reactants?
100
What is an element?
What is a substance that cannot be broken down into simpler substances by physical or chemical means?
100
The ____ organizes all known elements by atomic number.
What is the periodic table?
100
What does ductile mean?
What is able to be drawn into thin wires?
200
What are three physical properties?
What is mass, volume, and density?
200
The new substances that form are called the what?
What is products?
200
What is an atom?
What is the smallest unit of an element that has the chemical properties of the element?
200
Most elements on the table are ___.
What is metals?
200
what does malleable mean?
What is able to be pounded into thin sheets?
300
What is the difference between a physical and chemical change.
What is a change in physical properties of a substance without changing the substance itself? Chemical change is a reaction between substances that result in new substances with different chemical properties being formed.
300
What is the difference between reactants and products?
What is one of the original substances in a chemical reaction? What is one of the substances formed from a chemical reaction?
300
What is a compound?
What is when two or more atoms combine to form a new substance?
300
Metals are good conductors of __ and __ .
What is heat and electricity?
300
A __ is a combination of two or more substances in which the chemical properties of the substances do not change.
What is a mixture?
400
Give an example of a physical and chemical change.
What is glass breaking and baking a cake?
400
What is some sign that a reaction is taking place?
What is an indication?
400
Each unit of the compound is called a _____?
What is a molecule?
400
What are the three types of elements?
What is metal, nonmetal, and metalloid?
400
The periodic table is also organized by ___.
What is reactivity?
500
Is ice melting a physical or chemical change? Explain.
What is Physical change? It is a physical change because its changing physical properties such as volume and mass, without changing its substance.
500
What is exothermic?
What is a chemical reaction that produces heat is called an exothermic reaction?
500
A blank tells you the types and the numbers of atoms in a single molecule.
What is a chemical formula?
500
What is the first element in the periodic table?
What is Hydrogen?
500
A ___ is a mixture in which one substance dissolves into another substance?