ErickP8586
04.07.2019 •
Chemistry
Match the element with its number of valence electrons. match term definition nitrogen a) 5 silicon b) 4 oxygen c) 2 magnesium d) 6
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Ответ:
Valence electrons are that electrons that are present in the atom, outside the nucleus in orbits. The list of atoms with correct number of valance electrons is as follows;
A. Nitrogen: 5
B. Silicon: 4
C. Oxygen: 6
D. Magnesium: 2
Ответ:
Answer :
Element Valence electrons
Nitrogen 5
Silicon 4
Oxygen 6
Magnesium 2
Explanation :
Valence electrons : Valence electrons are the electrons which is present on the outermost shell of the electron.
The given element is nitrogen that belongs to group 15 and the atomic number 7.
The number of electrons present on nitrogen element are 7.
The electronic configuration of nitrogen element is,
The number of valence electrons present on nitrogen element are, 5.
The given element is silicon that belongs to group 14 and the atomic number 14.
The number of electrons present on silicon element are 14.
The electronic configuration of silicon element is,
The number of valence electrons present on silicon element are, 4.
The given element is oxygen that belongs to group 16 and the atomic number 8.
The number of electrons present on oxygen element are 8.
The electronic configuration of oxygen element is,
The number of valence electrons present on oxygen element are, 6.
The given element is magnesium that belongs to group 2 and the atomic number 12.
The number of electrons present on magnesium element are 12.
The electronic configuration of magnesium element is,
The number of valence electrons present on magnesium element are, 2.
Ответ:
When a supply of hydrogen gas is held in a 4-liter container at 320 K it exerts a pressure of 800 torrs. The supply is moved to a 2-liter container, and cooled to 16When a supply of hydrogen gas is held in a 4-liter container at 320 K it exerts a pressure of 800 torrs. The supply is moved to a 2-liter container, and cooled to 160 K. What is the new pressure of the confined gas?0 K. What is the new pressure of the confined gas?
Explanation: