What do elements of the same group have in common

1 answer:

4 0

Answer and explanation:

Elements of the same group have the same number of valence electrons, therefore they behave similarly. For example in group 2, alkaline earth metals, all the elements have two valence electrons.

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Consider this reaction: 2al(s) + 3 cucl2(aq) → 2alcl3(aq) + 3 cu(s) if the concentration of cucl2 drops from 1.000 m to 0.655 m

kirza4 [7]

The average rate of reaction over a given interval can be calculated by taking the difference of concentration on a particular given reactant, and dividing it by the total time. In this case, (1.00 M - 0.655 M)/30 s = 0.0115 M/s, or 0.0115 mol/L-s, and this is the final rate of reaction.

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3 years ago

For each solute, identify the better solvent: water or carbon tetrachloride

Rom4ik [11]

The better solvent for Na₂S (Natrium sulfide)and CH₃OH(methanol): water

The better solvent for C₆H₆(benzene) and Br₂(bromine) : CCl₄

<h3>Further explanation</h3>

In covalent bonds there are differences in electronegativity which causes polarization of the bonds

If the bond in an electron pair is more attracted to one atom, then the covalent bond is polar

This is due to the electron attraction of one atom which is bigger than the other atoms

But the geometrical shape of molecules can make molecules that have polar bonds can be polar or non-polar

The symmetrical shape of the molecule is usually a non-polar molecule

For example on H₂O

This molecule is polar because of the difference in electronegativity where the O atom has a stronger electron attraction when compared to the H atom, so this molecule have positive and negative poles where the negative pole is on the O atom

Polar molecules dissolved in water undergo ionization so they can conduct electricity and are electrolyte, while non-polar molecules are non-electrolyte.

<em>Polar molecules will dissolve polar molecules and vice versa non-polar molecules can dissolve non-polar molecules. </em>

So water molecules that can be used to test polar and non-polar molecules by dissolving them in water

The size of polarity is usually indicated by the magnitude of the dipole moment

The greater the dipole moment, the more polar the compound is. In non-polar compounds the dipole moment is zero.

water- H₂O is a polar solvent, due to the large electronegativity between O and H atoms, and the shape of the V molecule (asymmetrical)

CCl₄- Carbon tetrachloride is a nonpolar solvent, where C atoms as central and Cl atoms have different electronegativity but because of the symmetrical shape so that the dipole moment is removed and so it is nonpolar

Let see that each of these compounds is polar or non-polar

Na₂S (Natrium sulfide)and CH₃OH(methanol) are ion compounds that can dissolve in polar solvents such as water

C₆H₆(benzene) and Br₂(bromine) are non-polar covalent compounds with symmetrical shapes and do not have free electron pairs that can dissolve in CCl₄

<h3 /><h3>Learn more</h3>

ionic bonding

brainly.com/question/1603987

type of chemical bond

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Lewis structures

brainly.com/question/6085185

Keywords : chemical bond, covalen bond, water, electrons, dipole moment

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