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WorksheetsSubatomic Particles Pretest
Total questions: 25
Worksheet time: 19mins
The atomic number of an element is equal to the number of ______.
Neutrons
Protons
Electrons
Atoms
What is the atomic number of sodium (Na)?
(a)
What is the atomic number of fluorine (F)?
(a)
How many protons does Aluminum (Al) have?
(a)
How many protons does titanium (Ti) have?
(a)
What is the mass number of an atom with 15 protons and 14 neutrons?
(a)
If the mass number of an atom is 40 amu and the atomic number is 22, how many neutrons are there?
(a)
What is the mass number of an oxygen atom with 9 neutrons?
(a)
What is the mass number of an nitrogen atom with 9 neutrons?
(a)
What two subatomic particles contribute to the mass number?
Electrons
Protons
Neutrons
In a neutral atom, what 2 subatomic particles must be equal?
Neutrons
Protons
Electrons
In a neutral boron atom, how many electrons are there?
(a)
If a sodium ion has a +1 charge, how many electrons are there?
12
10
11
If a sulfur ion has a -2 charge, how many electrons are there?
16
14
18
Which subatomic particle changes in isotopes?
Protons
Neutrons
Electrons
Chlorine has 2 isotopes: chlorine-35 and chlorine-37. If chlorine-35 has 18 neutrons, how many would chlorine-37 have?
(a)
When an atom loses an electron, it becomes ________ charged.
positively
negatively
Do electrons contribute to the atomic mass of an atom?
YES of course, they are there for a reason
NO, they are useless to the atom
No, their mass is too small to contribute to the mass
YES, silly, they are the superstars of the atom
Number of protons in a +3 aluminum (Al) ion
(a)
Number of protons in a N-3 ion
(a)
Mass number of
714N
(a)
Number of neutrons in a Cl atom with a mass number of 37
(a)
