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Worksheets1.3 Electron Configuration and Ions
Total questions: 10
Worksheet time: 10mins
Which of the following is the definition of the mass number of an atom?
It is the number of protons + number of neutrons.
It is the number of neutrons
It is number protons
It is the number of protons = number of electrons
Define atomic number of an atom.
Atomic number if the number of protons and electrons of an atom.
It is the number of neutrons and protons of an atom.
Atomic number is the number of electrons in outer shell of an atom.
How many protons a calcium atom has?
20
40
40.078
20.078
How many neutrons a sodium atom has?
11
23
12
What is the electron configuration of an atom with 12 protons?
2.8.2
2.8.5
2.5.5
1s2 2s2 2p6 3s1
Which of the following is a correct definition of an ion?
A charged atom
An atom with its number of protons and electron are NOT equal
All answers are correct
An atom that gained or lost one or more electrons.
An atom with negative charge is called ____________.
cation
anion
both answers are correct
electrons
A neutral atom with 2.8.5 electron configuration. what is the charge of its ion?
-5
+3
-3
When an atom lose an electron, it will become a ____________.
cation
anion
proton
electron
An atom with 2.8.3 electron configuration. Its ion is a ____________.
(Hint: you need to find the charge)
metal cation
metal anion
non-metal cation
non-metal anion
