Bromine has chemical properties most similar to

Bromine has chemical properties most similar to

1.both are in 7a group. 2.both are halogens. 3.both have 7 valance electrons.

Option (1) and (2) are correct. Explanation: Elements which contain same number of valence electrons tend to show similar chemical properties. This is because having same number of valence electrons will make the atoms to react in a similar way. For example, Silicon is a group 14 element. So, it contains only 4 valence electrons. Similarly, germanium and lead are group 14 elements and it has 4 valence electrons. Therefore, silicon, germanium, and lead will have similar chemical properties. Whereas phosphorous is a group 15 element, and chlorine is a group 17 element. Thus, we can conclude that out of the given options germanium and lead elements has physical and chemical properties most similar to silicon (Si).

The correct answer is : (1) C3H7COOH.
Ethanoic acid has the molecular formula CH3COOH. It belongs to the homologous series of alkanoic acid or carboxylic acid. Homologous series are series of organic compounds in which a member differs from the next member by –CH2. One of the major characteristics of the homologues is their similarity in chemical properties. Propanoic acid (C3H7COOH) is the only member of the alkanoic acid family among the options given. So, it is the only one that has similar chemical properties with ethanoic acid.
The other options are wrong because: (2) C2H5OH belongs to the alcohol family.
(3) C2H5COOC2H5 belongs to the alkanoates family (esters)
(4) C2H5OC2H5 belongs to the ether family.

não sei

Cl, Br, I, and At have most simmilar properties to fluorine because they are all in the same group on the periodic table.

Answer 6

Germanium. Germanium is in the same group and is also a metalloid, like silicon

CalciumThis  is   because   both  magnesium   and  calcium   are  in  the  same  group  of   periodic  table   that   group  two.  They   are  both  alkaline   earth  metal  hence   they  have  same   properties   example  they  have    two  valence  electrons.

The answer is the number 3

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You need to first consider the properties of ethanoic acid that are worth noting. Ethanoic acid is a weak acid (the carboxyl group has a resonance-stabilized base), and the length of its carbon chain (2 carbons) reflects the strength of its Van der Waals forces. Also, the hydroxyl group (as part of the carboxyl group) confers a large dipole moment to the compound. The most similar compound would be the one that resembles ethanoic acid in these respects.
Thus, I would say that the answer is (2) C2H5OH. Because oxygen is highly electronegative, it can retain an extra electron without much difficulty, making the hydroxyl group slightly acidic. The hydroxyl group also confers a large dipole moment, and the 2 carbon backbone indicates similar Van der Waals interactions.

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