C1 Atoms, periodic table and chemical reactions
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What is an element?
A substance that contains only one type of atom
What substances are found in the periodic table?
Elements
What is the symbol for oxygen?
O
What is the symbol for sodium?
Na
Where are substances found with similar properties?
In the same group
What subatomic particles are in the nucleus in an atom?
Protons and neutrons
What subatomic particle goes around the nucleus in an atom?
Electrons
What is the charge on a proton?
+1
What is the charge on a neutron?
0
What is the charge on an electron?
-1
Do atoms have a charge, why?
No because the number of positive protons equal the number if negative electrons
A carbon atom has 6 protons how many electrons will it have?
6
What order are the elements in the modern periodic table?
Atomic number
How do you calculate the number of protons in an element?
Equal to the atomic number
Do you always get the same number of protons in an element?
Yes
How do you calculate the number of neutrons in Lithium?
Mass number- atomic number = 7-3=4
How many electrons can occupy the first (inner) shell?
2
How many electrons can occupy the second shell?
8
How many electrons can occupy the third shell?
8
Draw the electron structure of a Lithium atom.
How many outer electrons have the elements in group 1?
1
How many outer electrons have the elements in group 6?
6
What is the electron configuration for Lithium?
2,1
What is a compound?
Substance containing 2 or more elements chemically bonded together