The periodic table arranges elements in increasing
atomic number from left to right and top to bottom.
Horizontal rows on the periodic table are periods.
Elements in the same period have the same number of
electron shells.
Vertical columns on the periodic table are groups.
Elements in the same group have the same number of
valence electrons.
The right answer is D. three electrons are gained, creating N-3
Nitrogen has 5 electrons in it's valence shell and octet rule states that the valence shell must have 8 electrons. To satisfy that, Nitrogen gains 3 electrons that are negatively charged.Therefore, it gets a negative charge.
Normal rain has a pH between 5.0 and 5.5. The typical pH value for acid rain (when checked online) is 4.0.
Answer: d) 16.34 grams
Explanation:
To calculate the moles :
According to stoichiometry :
As 2 moles of 
are produced by= 4 moles of 
Thus 0.292 moles of are produced by= =
of
Mass of 
Thus 16.34 g of will be needed
Answer:
See the explanation below, please.
Explanation:
The elements of the periodic table that belong to the same group (each column) have similar physical and chemical properties. This is because they have the same number of electrons in their last electronic layer.
Example of electronic configuration of elements of GROUP IA:
Hydrogen: 1s ^ 1
Lithium: 1s ^ 2 2s ^ 1
