They will be in the same group (for example the halogens and noble gases).
Look at the periodic table.
All of them tend not to react with each other until you get lower down the group
many materials, both elements and compounds can react with each other to form a compound.
The elements in each column of the periodic table have generally similar chemical properties, except that in columns 8 through 10, the elements in each row are at least as similar to one another as those in the same columns in other rows.
When two or more elements are combined, it is known as a compound. Compounds are formed when elements chemically react with each other to create new substances with unique properties.
When two elements chemically bond to form a compound, it is known as a chemical reaction. During this process, atoms from each element combine to form new molecules with different properties than the original elements.
On the periodic table, the elements fall into groups (the vertical columns) which are often called families. The reason is that elements in a group are chemically similar to each other.
All of them tend not to react with each other until you get lower down the group
many materials, both elements and compounds can react with each other to form a compound.
The elements in each column of the periodic table have generally similar chemical properties, except that in columns 8 through 10, the elements in each row are at least as similar to one another as those in the same columns in other rows.
When atoms of two different elements chemically combine, they produce a compound. Such compounds include sodium chlorine, hydrogen fluorine, and barium sulfide. Note that if the elements are same, the result is a polyatomic element, not a compound.
Isotopes differ each other from the number of neutrons which is a chemically inert subatomic particle.
Because each set of atoms need each other to retain electron stability.
Elements in the same group on the periodic table have similar chemical properties because they have the same number of valence electrons. This similarity in valence electron configuration influences how the elements react with other substances and their physical properties.
When elements combine chemically, they form a compound. A compound is a substance made up of two or more different elements that are chemically bonded together in a fixed ratio. Each compound has its own unique set of physical and chemical properties.
Na (sodium) belongs to the first group (vertical row) in the periodic table, all of the other elements in this group (row) have similar characteristics to each other. In general, each group has similar characteristics.
Solids keep their shape because they are composed of elements and/or molecules which are chemically bound to each other by electrostatic forces operating on a submicroscopic level.
Cesium. For non-transition elements such as rubidium, cesium, and strontium, the most chemically similar element to any other element is always one in the same column of the periodic table but in an adjacent row. Since strontium is not in the same column as rubidium but cesium is in the same column and an adjacent row, the answer follows. (This rule is sometimes true also for transition elements, but not always: For example, for elements in columns 8, 9, and 10, the most nearly chemically similar element is one in the same row and an adjacent column within this group, rather than one in the same column but an adjacent row.)