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How many neutrons in an atom of gold?
118 (197-79=118)
Use your periodic table: How many electrons does calcium have?
20
Use your periodic table: Which atom has 6 protons?
Carbon
How many electrons in an oxygen atom?
8
Name five different atoms.
(Teacher checks)
What happens when the number of protons or electrons in an atom changes?
You get a different type of atom.
Two hydrogen atoms and one oxygen atom stuck together creates what molecule?
water (H2O)
More than one atom stuck together creates a ________________.
molecule
True or False: There are over 500 kinds of atoms
False - There are over 100 kinds of atoms
True or False: Atoms are mostly empty space
True
True or false: Hydrogen is the most abundant atom on Earth
True
True or False: only living things are made of atoms
False - ALL things are made of atoms
How do you find the number of neutrons in an atom?
atomic mass - atomic number
How do you find the number of electrons in an atom?
It is equal to the atomic number
How do you find the number of protons in an atom?
It is equal to the atomic number
The center of an atom is called the __________.
nucleus
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