The answer is Bromine because krypton is noble gas.
It is because bromine is smaller in size than iodine and hence easily reacts. Another reason is that bromine is the more electronegative than iodine and hence it attracts the electrons very easily from other atoms to form bonds.
Bromine has 35 protons and 35 electrons (if it is neutral). Rubidium has 37 protons and 37 electrons (if it is neutral as well). The atomic number is equivalent to the number of protons in an atom. You can easily solve this problem by looking at your periodic table, finding Bromine (Br) and then moving 2 atoms along the chart. There you will find Rubidium.
Chlorine is very reactive because it is a halogen (Group VII of the Periodic Table) and it does not have a filled outermost energy level. Argon is unreactive because it is a noble gas (Group VIII of the Periodic Table). Its outermost energy level is full.
In most cases, chlorine is more reactive than bromine. This occurs because chlorine has a higher electronegativity than bromine. Thus, chlorine tends to take electrons from other substances more readily than bromine, and thus is more reactive.
The reason why fluorine has a higher ionization energy level than oxygen is because it is closer to the nucleus than is oxygen, therefore, it will take more energy to pull electrons from the nucleus.
The force of attraction between the atom's nucleus and its valence electrons are the least. Hence valence electrons are lost easily.
It is because bromine is smaller in size than iodine and hence easily reacts. Another reason is that bromine is the more electronegative than iodine and hence it attracts the electrons very easily from other atoms to form bonds.
Carpets and balloons both give up electrons easily.
This is because the outermost or valence electrons experience very less attraction from the nucleus. Thus those electrons are easily attracted and hence making the ion polarised.
Bromine has 35 protons and 35 electrons (if it is neutral). Rubidium has 37 protons and 37 electrons (if it is neutral as well). The atomic number is equivalent to the number of protons in an atom. You can easily solve this problem by looking at your periodic table, finding Bromine (Br) and then moving 2 atoms along the chart. There you will find Rubidium.
The lone pair of electrons in the ammonia molecule is located in the outermost electron shell of the ammonia molecule. This will enable it to easily form a bond with any compound that it is mixed with.
Metals are the elements that usually lose electrons in their chemical reactions. This is because they have few electrons in their outermost shells which are easily lost.
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Chlorine is very reactive because it is a halogen (Group VII of the Periodic Table) and it does not have a filled outermost energy level. Argon is unreactive because it is a noble gas (Group VIII of the Periodic Table). Its outermost energy level is full.
Bromine has more nuclear charge as compared to iodine. So, bromine easily attracts an electron and hence more reactive.
chlorine and bromine
Valence electrons are the electrons present in the outermost shell of an atom.You can easily determine the number of valence electrons an atom can have by looking at its Group in the periodic table.For example, atoms in Groups 1 and 2 have 1 and 2 valence electrons, respectively.Atoms in Groups 13 and 18 have 3 and 8 valence electrons, respectively.