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WorksheetsChemistry revision
Total questions: 18
Worksheet time: 10mins
What is the combined mass of all the protons and neutrons of an atom and is approximately equal to the number of protons and neutrons?
atomic mass
atomic number
subatomic particles
nucleus weight
What is the number of protons in the nucleus of an atom that determines the chemical properties of an atom?
mass number
atomic mass
atomic number
atomic symbol
Which particles change the charge in atoms when ions are formed?
Protons
Electrons
Neutrons
What are valence electrons?
The total number of electrons in an atom
The number of electrons in the outermost shell
The number of electrons in the second shell
The number of protons in the outermost shell
USE THE PERIODIC TABLE
How many valence electrons does Phosphorus have?
31
5
15
4
If both protons and neutrons are found in the nucleus, why is it positive?
The reason it is positive is because neutrons have a positive charge and protons have a negative charge.
The reason it is positive is because neutrons have a negative charge and protons have a positive charge
The reason it is positive is because neutrons have no charge and protons have a positive charge.
The reason it is positive is because neutrons have no charge and protons have a negative charge
lst shell holds
2
8
18
32
How many electrons can the 2nd shell hold
0
2
4
8
