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What are Molecules?
What are Elements?
What are Compounds?
How do scientists know what are like?
Identifying Elements
100
What is molecule?
The smallest particle of a substance that has the same properties as the substance.
100
What is an element?
Matter that has only one kind of atom.
100
What is a compound?
A substance that is formed when atoms of two or more atoms join together.
100
What is a model?
a picture, idea, or object that is built to explain how something else looks or works
100
Atomic number = ______________
Number of protons (electrons as well)
200
What is an atom?
The building block of matter
200
What are natural elements?
Elements found in nature.
200
What are two examples of compounds?
Answers may vary.
200
What is stored in the center of a nucleus?
Protons and Neutrons
200
Mass number = ________________
number of protons and neutrons
300
Name the states of matter.
Solid, Liquid, Gas, Plasma
300
Give three examples of natural elements.
copper, silver, helium, oxygen, nitrogen, neon, gold, hydrogen
300
How would you break down water into elements?
Hydrogen and Oxygen
300
What are the charges for each part of an atom?
Proton - positive Neutron - neutral Electron - negative
300
Given the atomic number of 8, how many protons and electrons are there?
8 protons, 8 electrons
400
How is solids and liquids different from each other?
Solids have a definite shape and volume where as liquids do not have a definite shape. The particles in a solids are tightly packed where as a liquid's particles are more fluid.
400
Give an example of where you might see natural elements?
Answers may vary.
400
What are two compounds that contain sodium?
baking soda, table salt
400
Why do scientists use models?
To show that an atom looks like and how it acts
400
Knowing there are 16 protons and a mass number of 32, what is the atomic number? Electrons? Neutrons?
Atomic number: 16 Electrons: 15 Neutrons: 16
500
How is plasma different from all other states of matter?
Plasma is very hot gas where particles have an electric charge.
500
What are the elements in water?
2 Hydrogen and 1 Oxygen
500
What are two compounds that contain oxygen?
Water, sugar, baking soda
500
If you can not see an atom, how do you know what they look like?
Scientists study how an atoms behaves in order to see what they look like.
500
Given the the mass number of 25 and 12 protons, what is the atomic number? Electrons? Neutrons?
Atomic Number: 12 Electrons: 12 Neutrons: 13