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WorksheetsQ2-Summative 2
Total questions: 14
Worksheet time: 7mins
Which of the following has 2 valence electrons?
Aluminum
Beryllium
Carbon
Lithium
What is the symbol of Sodium?
(a)
Which pair of elements belongs to the same group because they have the same number of valence electrons?
Carbon (C) and Oxygen (O)
Nitrogen (N) and Sulfur (S)
Sodium (Na) and Potassium (K)
Magnesium (Mg) and Aluminum (Al)
Which of the following statements is true about elements in the same group of the periodic table?
They have the same number of neutrons
They have the same number of energy levels.
They have the same number of valence electrons.
They have the same number of protons and electrons.
Which of the following numbers of valence electrons represent oxygen?
(a)
What do carbon (C), silicon (Si), and tin (Sn), which are all found in Group 14, have in common?
They all have 2 valence electrons.
They all have 4 valence electrons.
They all have 6 valence electrons.
They all have 8 valence electrons
The element boron has an electron configuration of 1s² 2s² 2p¹. Why should we place it under Group IIIA of the periodic table
It has a filled valence shell.
It has three valence electrons in the 2s orbital.
It has three valence electrons in its outermost shell
It has only one electron in its outermost energy level
In which period should we place the element with electron configuration of 1s2 2s2 2p3?
Group 1 A
Group III A
Group V A
Group VII
Which of the following is not one of the first 20 elements?
Calcium
Iron
Neon
Oxygen
Which of the following describes the properties of elements in Group 1?
Highly reactive
Inert gases
Nonmetals
Very stable
Which statement best describes elements in the same vertical group on the periodic table?
They have the same density
They have the same atomic mass
They have the same melting point
They have the same number of valence electrons
Which element has an electron configuration of 2, 8, 1?
Magnesium
Neon
Sodium
Sulfur
Which of the following elements has the electron configuration 2, 8, 8, 2?
Calcium
Magnesium
Pottasium
Sodium
What is the electron configuration of Si?
1s² 2s² 2p4 3s² 3p²
1s1 2s² 2p⁶ 3s² 3p2
1s² 2s² 2p⁶ 3s² 3p2
1s² 2s² 2p5 3s² 3p²
