atoms are made of 3 types of sub atomic particles- protons, neutrons and electrons
from these 3 particles, electrons are responsible for participating in chemical bonds. therefore chemical properties of elements are based on the number of electrons present.
valence electrons are the number of electrons in the outermost energy shell that are involved in chemical bonds.
atoms with same number of valence electrons are grouped in to columns called groups.
therefore elements of the same group have same number of valence electrons, hence similar chemical properties.
from the options given
only Be and Mg belong to the same group they both belong to group 2 with 2 valence electrons
therefore Be and Mg have similar chemical properties
answer is
1) Be and Mg
Answer:
4.39
Explanation:
Let's consider the following reaction at equilibrium.
2 NH₃(g) ⇄ 3 H₂(g) + N₂(g)
The concentration equilibrium constant (Kc) is the product of the concentration of the products raised to their stoichiometric coefficients divided by the product of the concentration of the reactants raised to their stoichiometric coefficients.
Kc = [H₂]³.[N₂]/[NH₃]²
Kc = (0.700)³.(0.800)/(0.250)²
Kc = 4.39
The answer is true. oxygen, the terminal electron acceptor, and water is formed as the product. pass through special proton channel proteins called ATP synthase. Arrange the following electron acceptors in the proper order in which they participate in electron transport. When oxygen accepts electrons, water is produced as a byproduct.
The elements have the same number of electrons in the outer ring so they react with the same substances