Group 7 elements: manganese (Mn), Technetium (Tc), Rhenium (Re), Bohrium (Bh); all are metals.
they are all in the same period in the periodic table, they all have the same valance number
No, Group 7A elements are the halogens - a highly reactive group of nonmetals. Alkaline earth metals are found in Group 2A of the periodic table and are characterized by being shiny, silvery-white metals that react readily with water.
The elements of the 1st GROUP of the periodic table are called alkali metals. The elements of the 17th GROUP of the periodic table are called halogens. Alkali metals are soft metals whereas halogens are non-metals.
Antimony is an element, so it is neither silicate nor non-silicate
All halogens are nonmetals, with the possible exception of astatine, which has no stable isotopes (its MOST stable isotope has a half-life of about 8 hours) and has never been observed in bulk. Astatine may be a semiconductor or even metallic in character; we just don't really know.
All you have to do is look on your periodic table of elements. Metals are to the left and non-metals are to the right. This way we know group four are metals.
Group 18 of the Periodic Table has only non metals. Additionally, the stable elements of group 17 are also non metals.
Alkali metalsNonmetalsHalogens
Group 1 (for metals) and group 17 (for non metals).
all elements that are not main group elements are metals, and since rhenium is not a main group element, it is a metal. Hope this helped!
The elements classified as non-metals are in right direction. They are present in group-15,16,17.
non-metals
Metalloids
Lead is a transition state element, and all of the transition state elements are metals; there are no non-metal elements in the transition state.
Group 1 (metals) and Group 17 (non-metals).
all non-metals and are found in the earth's crust
their general properties is that they are all non metals