Atoms & Elements
What is the smallest unit of matter?
What is an atom?
What does the periodic table organize?
The elements.
This particle has a positive charge.
What is a proton?
What should you always wear to protect your eyes in the lab?
Safety goggles.
What are the three main states of matter?
Solid, liquid, gas.
This is a substance made of only one kind of atom.
What is an element?
What does the atomic number tell you?
The number of protons.
Where are electrons located in an atom?
In the electron cloud / orbitals around the nucleus.
True or False: You should taste chemicals to find out what they are.
False
Which state of matter has a definite shape and volume?
What is a solid?
This element’s symbol is “O”.
What is oxygen?
Which element has the symbol “Na”?
What is sodium?
Which two particles are found in the nucleus?
What are protons and neutrons?
What should you do if a chemical spills?
Tell the teacher immediately.
What is anything that takes up space and has mass?
What is matter?
Two or more elements that are chemically bonded together form a ___.
What is a compound?
The rows on the periodic table are called ___.
What are periods?
This particle has no charge.
What is a neutron?
Why should long hair be tied back during labs?
To keep it away from flames or chemicals.
Boiling water is what kind of change?
What is a physical change?
What’s the difference between an element and a compound?
An element is one type of atom; a compound has two or more elements bonded together.
Name one way elements are grouped together in the periodic table.
By similar properties, columns (families), or number of valence electrons.
An atom has 6 protons and 6 neutrons. What is its mass number?
What is 12?
Name 3 safety rules to follow in a lab.
Answers vary
What’s the difference between a chemical and physical change?
Chemical changes form a new substance; physical changes don’t.