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WorksheetsElectronic Configuration
Total questions: 20
Worksheet time: 14mins
The atomic number tells you...
the number of protons
the number of neutrons
the number of electrons
What charge do electrons have?
Positive
Neutral
Negative
How many electrons can the third shell have?
Two
Eight
Five
Three
Which two particles are contained in the nucleus of an atom?
Protons and Neutrons
Protons and Electrons
Electrons and Neutrons
Chemists can identify the composition of some unknown salts by conducting a flame test. When potassium salts are heated in a flame, a purple color is observed.
This is due to the movement of electrons between energy levels. What is the electron configuration of a potassium atom at ground state?
1s2; 2s2; 2p6; 3s2; 3p6; 4d1
1s2; 2s2; 2p6; 3s2;3p6; 3d1
1s2; 2s2; 2d6; 3s2; 3d6; 4s1
1s2; 2s2; 2p6; 3s2; 3p6; 4s1
1s22s22p63s23p64s23d10
Which element has 2,8,8 electrons per shell?
Lead
Fluorine
Neon
Argon
Which one of the following is the electronic configuration of the bromine atom?
1s22s22p63s23p63d104s14p6
1s22s22p63s23p63d104s24p7
1s22s22p63s23p63d104s24p5
1s22s22p63s23p63d104s24p6
The vanadium atom (atomic number 23) in its ground state has the electronic configuration:
1s2 2s2 2p6 3s2 3p6 3d3 4s2
1s2 2s2 2p6 3s2 3p6 3d2 4s3
1s2 2s2 2p6 3s2 3p6 3d1 4s2 4p2
1s2 2s2 2p6 3s2 3p6 3d2 4s2 4p1
The Nucleus is in the ________ of the atom.
Centre
Outside
Vacuum
Neutron
Atoms are neutral because...
They have 3 particles
Neutrons and protons = 0
They have equal numbers of protons and electrons
They have a pH of 7
The mass of an atom is concentrated in the...
Neutrons
Protons
Orbitals
Nucleus
An atom with a charge of 2- will have...
2 more electrons than protons
2 more neutrons than electrons
2 more protons than electrons
2 electrons less than protons
