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WorksheetsQ3G8 Summative Test #3: Particles in an Atom
Total questions: 20
Worksheet time: 20mins
Which of the subatomic particles can be found outside the nucleus?
electrons
protons
neutrons
nucleons
. Which of the following is more massive?
proton and electron
proton and neutron
electron and neutron
proton only
. Protons, electrons and neutrons are collectively referred to as
atoms
atomic models
shells
subatomic particles
Which of the following is the charge of an electron?
positive (+)
no charge (0)
negative (-)
both positive
What does the number 32 in the symbol S-32 represent?
atomic number
mass number
number of neutrons
number of protons
What atomic model proposed by J.J. Thomson?
nuclear model
planetary model
plum-pudding model
atomic model
Atoms with the same number of protons but different in number of neutrons.
electrons
ions
isotopes
protons
Which of the following is a positively charged ion?
cation
anion
cathode
proton
It is formed when there is a loose or gain of an electron.
isotopes
ions
electrons
protons
Oxygen has 8 protons and 8 neutrons, the mass number of Oxygen is ______________
4
8
12
16
It is the difference between the mass number and the number of protons.
mass number
protons
electrons
neutrons
It is the sum of the number of protons and neutrons.
mass number
atomic number
number of protons
number of electrons
Which scientist performed the cathode ray tube experiment to determine the particles in an atom?
JJ Thomson
Dalton
Leucipus
Democritus
Fill in the blanks:
In an isotope of N-14, the number of electrons is 7. The number of protons is (a)
Fill in the blank:
In an isotope of N-14, the number of electrons is 7. The number of neutrons is (a) .
Complete the data:
Symbol: K
Name of element: (a)
Mass number (A): 39
n(0): 20
p(+): 19
Atomic number (Z): 19
e(-): 19
Fill in the blank:
Symbol: (a)
Element name: Tungsten
Mass number (A): 184
Neutron (0): 110
Proton (+): 74
Atomic number (Z): 74
Electron (-):
Fill in the blank:
Symbol:
Element name: Tungsten
Mass number (A): 184
Neutron (0): 110
Proton (+): 74
Atomic number (Z): 74
Electron (-): (a)
Fill in the blank:
Symbol:
Element name:
Mass number (A): 23
Neutron (0): (a)
Proton (+):
Atomic number (Z):
Electron (-): 11
Fill in the blank:
Symbol:
Element name:
Mass number (A): 23
Neutron (0):
Proton (+): (a)
Atomic number (Z):
