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WorksheetsScience 8 Review
Total questions: 15
Worksheet time: 5mins
Who proposed the law of triads, grouping elements into sets of three based on similar properties?
Dmitri Mendeleev
John Newlands
Johann Wolfgang Döbereiner
Julius Lothar Meyer
which element is located in the Group 6, Period 5
Molybdenum (Mo)
Tungsten (W)
Chromium (Cr)
Niobium (Nb)
Group 1 Period 1
Sodium (Na)
Hydrogen (H)
Helium (He)
Beryllium (Be)
Which of the following elements is a metalloid?
Sodium (Na)
Hydrogen (H)
Helium (He)
Boron (B)
Which principle states that electrons occupy the lowest energy orbitals available?
Hund's rule
Pauli exclusion principle
Aufbau principle
Octet rule
Which of the following elements is expected to have similar chemical behavior to Carbon (C)?
Boron (B)
Silicon (Si)
Beryllium (Be)
Calcium (Ca)
Which ancient Greek philosopher believed in the concept of the Trio Prima ?
Aristotle
Dmitri Mendeleev
Paracelsus
Marie Curie
Considering its position in the periodic table, which element is expected to have the highest electronegativity?
Sodium (Na)
Oxygen (O)
Aluminum (Al)
Argon (Ar)
What is the electron configuration of nitrogen (N)?
1s² 2s² 2p¹
1s² 2s² 2p³
1s² 2s² 2p²
1s² 2s² 2p⁴
The particles Gaseous substances have the highest kinetic energy.
True
False
Melting is the process of changing a solid directly into a gas without going through the liquid phase. gy.
True
False
Since the particles of a solid material is compact, they have indefinite shape and volume
True
False
How many electrons can be accommodated in the 5d sublevel?
2
6
10
14
Which of the following elements has an electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁶
Potassium (K)
Calcium (Ca)
Argon (Ar)
Krypton (Kr)
What is the significance of the periods in the periodic table?
The number of protons in the nucleus
The number of electrons in the outermost shell
The number of electron shells
The column number on the periodic table
