The vertical "groups" group elements by chemical properties the horizontal "periods" group elements by the number of energy levels
All elements in group 16 share similar properties because their valence shells all contain the s2p4 electron configuration.
Selenium has similar properties to sulfur as they are both in the same group on the periodic table (Group 16) and share similar chemical reactivity and properties.
Atom number 20 is Calcium (period IV, group 2)
Potassium will share more properties with sodium as they both belong to the same group (Group 1) in the periodic table. They both have similar chemical reactivity and form similar types of compounds. Calcium, on the other hand, belongs to Group 2 and exhibits different properties compared to potassium.
All elements in group 16 share similar properties because their valence shells all contain the s2p4 electron configuration.
The vertical elements are called groups. They have similar chemical properties.
At Room Tempeture, Metals contain the most Elemants.
Yes, they do (since they have the same number of valence electrons).
They all have the same number of valence electrons
Selenium and tellurium are elements that have similar chemical properties to sulfur. They belong to the same group (Group 16) in the periodic table, known as the chalcogens, and share similar chemical reactivity and properties with sulfur.
Elements in the same group have similar characteristics because they have the same number of valence electrons, which determines their chemical properties. In contrast, elements in the same period have different characteristics because they have different numbers of energy levels and electron configurations.