They can, however in Groups the properties are much more similar.
true
Yes, elements in the same period on the periodic table have the same number of electron shells. This results in similar chemical properties among the elements in the same period, as they have comparable electron configurations.
no
elements in the same group
It depends. If the elements are in the same period or column, then there properties could be very similar. The number of protons is what determines the element. because no element has the same number of protons, no two elements have the exact same properties. For example, because Sodium (Na) and potassium (K) are in the same period, they are both metals, they both have one valence electron and both explode when they are put in water. The difference between these 2 is Potassium has a larger explosion because Potassium is more of a concentrate. The point is, two elements can be very similar, but no two elements are exactly the same.
You would likely find five elements with very similar properties in the same group of the periodic table. For example, elements in Group 1 (alkali metals) like lithium, sodium, potassium, rubidium, and cesium share similar characteristics such as being soft, highly reactive metals with low melting points and easily losing electron to form cations.
All the elements in the same group as Flourine have similar properties. This group of elements is referred to as the halogens, and is located in group 7.
There is no fully objective answer to this question. Many chemists would consider that two lanthanide elements with atomic numbers differing by only one would be likely to qualify. Another possibility is the pair zirconium and hafnium. These are very similar in most chemical characteristics but differ greatly in electron capture tendencies in nuclear reactors.
Uranium and neodymium are very different chemical elements.
No: The compounds more often have very different properties from those of the elements that form them.
Group 1 have one valence electron. The elements in Group 2 have two. The elements in Group 17 have seven valence electrons, and Group 18 elements have eight. Because the valence electrons within a family are the same, the elements in that group have similar properties.
Bromine and iodine are two elements that have properties similar to chlorine. They are all halogens and share common characteristics such as high reactivity and the ability to form compounds with other elements easily.